UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   FORM N-CSR

              CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT
                              INVESTMENT COMPANIES

Investment Company Act file number 811-21197
                                   811-21300

Name of Fund: WCMA Government Securities Fund
              Master Government Securities LLC

Fund Address: 100 Bellevue Parkway, Wilmington, DE 19809

Name and address of agent for service: Donald C. Burke, Chief Executive
      Officer, WCMA Government Securities Fund and Master Government Securities
      LLC, 800 Scudders Mill Road, Plainsboro, NJ 08536. Mailing address: P.O.
      Box 9011, Princeton, NJ 08543-9011

Registrant's telephone number, including area code: (800) 221-7210

Date of fiscal year end: 03/31/2008

Date of reporting period: 04/01/2007 - 03/31/2008

Item 1 - Report to Stockholders



Annual Report
March 31, 2008

WCMA Government
Securities Fund



Table of Contents

================================================================================
                                                                            Page
- --------------------------------------------------------------------------------
A Letter to Shareholders .................................................     3
Annual Report:
Disclosure of Expenses ...................................................     4
Current Seven-Day Yields .................................................     4
Fund Financial Statements:
    Statement of Assets and Liabilities ..................................     5
    Statement of Operations ..............................................     5
    Statements of Changes in Net Assets ..................................     6
Fund Financial Highlights ................................................     7
Fund Notes to Financial Statements .......................................    11
Fund Report of Independent Registered Public Accounting Firm .............    14
Fund Important Tax Information (Unaudited) ...............................    14
Master LLC Portfolio Summary .............................................    15
Master LLC Financial Statements:
    Schedule of Investments ..............................................    16
    Statement of Assets and Liabilities ..................................    17
    Statement of Operations ..............................................    17
    Statements of Changes in Net Assets ..................................    18
Master LLC Financial Highlights ..........................................    18
Master LLC Notes to Financial Statements .................................    19
Master LLC Report of Independent Registered Public Accounting Firm .......    21
Officers and Directors ...................................................    22
Additional Information ...................................................    25


2           WCMA GOVERNMENT SECURITIES FUND           MARCH 31, 2008


A Letter to Shareholders

Dear Shareholder

Financial markets endured severe bouts of volatility during the reporting
period, particularly as the calendar turned to 2008. It was then that fears of
an economic recession swelled and credit market strains intensified, producing
calamity in the financial system and, ultimately, the demise of major Wall
Street firm Bear Stearns.

The Federal Reserve Board (the "Fed"), after cutting the target federal funds
rate 100 basis points (1%) between September 2007 and year-end, stepped up its
efforts to support the ailing financial sector in the first three months of
2008. The central bank cut interest rates 125 basis points in January alone, and
followed with another 75-basis-point cut on March 18, bringing the target rate
to 2.25%. In an unprecedented move, the Fed also extended its financing
operations directly to broker/dealers and assisted JPMorgan in its buyout of
ill-fated Bear Stearns.

Against this backdrop, investor anxiety has been acute and equity markets have
struggled. The S&P 500 Index of U.S. stocks was down in March, marking the fifth
consecutive month of negative returns. International markets outperformed the
U.S. for much of 2007, but that trend changed in more recent months as investors
grew increasingly reluctant to take on the risks of foreign investing.

In fixed income markets, an ongoing investor flight to quality continued to
drive Treasury yields lower and their prices higher. The yield on 10-year
Treasury issues, which touched 5.30% in June 2007 (its highest level in five
years), fell to 4.04% by year-end and to 3.45% by March 31. Investors largely
shunned bonds associated with the housing and credit markets, and the riskier
high yield sector landed in negative territory year-to-date. Meanwhile, the
municipal bond market has struggled with concerns around the creditworthiness of
monoline bond insurers and the failure of auctions for auction rate securities,
driving yields higher and prices lower across the curve. At period-end,
municipal bonds were trading at higher yields than their Treasury counterparts,
a very unusual occurrence by historical standards.

Overall, the major benchmark indexes posted mixed results for the current
reporting period, generally reflecting heightened investor risk aversion:



Total Returns as of March 31, 2008                                                     6-month    12-month
==========================================================================================================
                                                                                            
U.S. equities (S&P 500 Index)                                                          -12.46%    - 5.08%
- ----------------------------------------------------------------------------------------------------------
Small cap U.S. equities (Russell 2000 Index)                                           -14.02     -13.00
- ----------------------------------------------------------------------------------------------------------
International equities (MSCI Europe, Australasia, Far East Index)                      -10.50     - 2.70
- ----------------------------------------------------------------------------------------------------------
Fixed income (Lehman Brothers U.S. Aggregate Index)                                    + 5.23     + 7.67
- ----------------------------------------------------------------------------------------------------------
Tax-exempt fixed income (Lehman Brothers Municipal Bond Index)                         + 0.75     + 1.90
- ----------------------------------------------------------------------------------------------------------
High yield bonds (Lehman Brothers U.S. Corporate High Yield 2% Issuer Capped Index)    - 4.01     - 3.47
- ----------------------------------------------------------------------------------------------------------


Past performance is no guarantee of future results. Index performance shown for
illustrative purposes only. You cannot invest directly in an index.

As you navigate today's volatile markets, we encourage you to review your
investment goals with your financial professional and to make portfolio changes,
as needed. For more up-to-date commentary on the economy and financial markets,
we invite you to visit www.blackrock.com/funds. As always, we thank you for
entrusting BlackRock with your investment assets, and we look forward to
continuing to serve you in the months and years ahead.

Sincerely,


/s/ Rob Kapito

Rob Kapito
President, BlackRock Advisors, LLC


                                                                               3
THIS PAGE NOT PART OF YOUR FUND REPORT


Disclosure of Expenses

Shareholders of this Fund may incur the following charges: (a) expenses related
to transactions, including sales charges, redemption fees and exchange fees; and
(b) operating expenses, including advisory fees, distribution fees including
12b-1 fees, and other Fund expenses. The expense example below (which is based
on a hypothetical investment of $1,000 invested on October 1, 2007 and held
through March 31, 2008) is intended to assist shareholders both in calculating
expenses based on an investment in the Fund and in comparing these expenses with
similar costs of investing in other mutual funds.

The table provides information about actual account values and actual expenses.
In order to estimate the expenses a shareholder paid during the period covered
by this report, shareholders can divide their account value by $1,000 and then
multiply the result by the number in the first line under the heading entitled
"Expenses Paid During the Period."

The table also provides information about hypothetical account values and
hypothetical expenses based on the Fund's actual expense ratio and an assumed
rate of return of 5% per year before expenses. In order to assist shareholders
in comparing the ongoing expenses of investing in this Fund and other funds,
compare the 5% hypothetical example with the 5% hypothetical examples that
appear in other funds' shareholder reports.

The expenses shown in the table are intended to highlight shareholders' ongoing
costs only and do not reflect any transactional expenses, such as sales charges,
redemption fees or exchange fees. Therefore, the hypothetical table is useful in
comparing ongoing expenses only, and will not help shareholders determine the
relative total expenses of owning different funds. If these transactional
expenses were included, shareholder expenses would have been higher.

Expense Example



                                          Actual                                                  Hypothetical**
                  -------------------------------------------------------    -------------------------------------------------------
                     Beginning           Ending                                 Beginning           Ending
                   Account Value     Account Value       Expenses Paid        Account Value     Account Value       Expenses Paid
                  October 1, 2007    March 31, 2008    During the Period*    October 1, 2007    March 31, 2008    During the Period*
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                      
Class 1 .........     $1,000           $1,010.20             $8.23               $1,000           $1,017.11              $8.26
Class 2 .........     $1,000           $1,013.40             $5.04               $1,000           $1,020.30              $5.05
Class 3 .........     $1,000           $1,015.00             $3.41               $1,000           $1,021.91              $3.42
Class 4 .........     $1,000           $1,015.00             $3.41               $1,000           $1,021.91              $3.42
- ------------------------------------------------------------------------------------------------------------------------------------


*     For each class of the Fund, expenses are equal to the annualized expense
      ratio for the class (1.62% for Class 1, 0.99% for Class 2, 0.67% for Class
      3 and 0.67% for Class 4), multiplied by the average account value over the
      period, multiplied by 185/366 (to reflect the one-half year period shown).
      Because the Fund is a feeder fund the expense table example reflects the
      expenses of both the feeder fund and the master fund in which it invests.
**    Hypothetical 5% annual return before expenses is calculated by pro-rating
      the number of days in the most recent fiscal half year divided by 366.

Current Seven-Day Yields

As of March 31, 2008
- --------------------------------------------------------------------------------
Class 1 ................................................................   0.29%
Class 2 ................................................................   0.95
Class 3 ................................................................   1.28
Class 4 ................................................................   1.28
- --------------------------------------------------------------------------------


4           WCMA GOVERNMENT SECURITIES FUND           MARCH 31, 2008


Statement of Assets and Liabilities

March 31, 2008                                   WCMA Government Securities Fund
================================================================================
Assets
- --------------------------------------------------------------------------------
Investment at value -- Master Government Securities LLC
  (the "Master LLC") (cost -- $510,055,663) ....................    $510,055,663
Prepaid expenses and other assets ..............................          26,791
                                                                    ------------
Total assets ...................................................     510,082,454
                                                                    ------------
================================================================================
Liabilities
- --------------------------------------------------------------------------------
Administration fees payable ....................................         110,782
Distribution fees payable ......................................          53,937
Other affiliates payable .......................................           2,513
Other accrued expenses payable .................................          23,151
                                                                    ------------
Total liabilities ..............................................         190,383
                                                                    ------------
================================================================================
Net Assets
- --------------------------------------------------------------------------------
Net Assets .....................................................    $509,892,071
                                                                    ============
================================================================================
Net Assets Consist of
- --------------------------------------------------------------------------------
Class 1 shares of beneficial interest, $0.10 par value,
  unlimited number of shares authorized ........................    $  1,054,281
Class 2 shares of beneficial interest, $0.10 par value,
  unlimited number of shares authorized ........................       8,887,532
Class 3 shares of beneficial interest, $0.10 par value,
  unlimited number of shares authorized ........................      15,482,253
Class 4 shares of beneficial interest, $0.10 par value,
  unlimited number of shares authorized ........................      25,561,823
Paid-in capital in excess of par ...............................     458,873,007
Accumulated net realized gain allocated from
  the Master LLC ...............................................          33,175
                                                                    ------------
Net Assets .....................................................    $509,892,071
                                                                    ============
================================================================================
Net Assets Value
- --------------------------------------------------------------------------------
Class 1 -- Based on net assets of $10,543,655 and 10,542,813
  shares of beneficial interest outstanding ....................    $       1.00
                                                                    ============
Class 2 -- Based on net assets of $88,880,832 and 88,875,321
  shares of beneficial interest outstanding ....................    $       1.00
                                                                    ============
Class 3 -- Based on net assets of $154,833,499 and
  154,822,533 shares of beneficial interest outstanding ........    $       1.00
                                                                    ============
Class 4 -- Based on net assets of $255,634,085 and
  255,618,231 shares of beneficial interest outstanding ........    $       1.00
                                                                    ============

Statement of Operations

Year Ended March 31, 2008                        WCMA Government Securities Fund
================================================================================
Investment Income
- --------------------------------------------------------------------------------
Interest from affiliates ......................................    $    111,190
Net investment income allocated from the Master LLC:
  Interest ....................................................      20,667,201
  Expenses ....................................................      (1,155,930)
                                                                   ------------
Total income ..................................................      19,622,461
                                                                   ------------
================================================================================
Expenses
- --------------------------------------------------------------------------------
Administration ................................................       1,201,641
Service and distribution -- Class 1 ...........................         116,470
Service and distribution -- Class 2 ...........................         557,019
Service and distribution -- Class 3 ...........................         609,444
Service and distribution -- Class 4 ...........................         823,764
Registration ..................................................         364,049
Printing ......................................................          37,426
Professional ..................................................          36,984
Transfer agent -- Class 1 .....................................           5,767
Transfer agent -- Class 2 .....................................           7,520
Transfer agent -- Class 3 .....................................           5,087
Transfer agent -- Class 4 .....................................           5,692
Officer .......................................................             223
Miscellaneous .................................................          11,627
                                                                   ------------
Total expenses ................................................       3,782,713
Waiver of expenses ............................................      (1,271,834)
                                                                   ------------
Total expenses after waiver ...................................       2,510,879
                                                                   ------------
Net investment income .........................................      17,111,582
                                                                   ------------
================================================================================
Realized and Unrealized Gain Allocated from the Master LLC
- --------------------------------------------------------------------------------
Net realized gain on investments ..............................          31,548
Net change in unrealized appreciation/depreciation
  on investments ..............................................         289,536
                                                                   ------------
Total net realized and unrealized gain ........................         321,084
                                                                   ------------
Net Increase in Net Assets Resulting from Operations ..........    $ 17,432,666
                                                                   ============

See Notes to Financial Statements.


           WCMA GOVERNMENT SECURITIES FUND           MARCH 31, 2008           5


Statements of Changes in Net Assets              WCMA Government Securities Fund



                                                                                            Year Ended March 31,
                                                                                       -------------------------------
Increase (Decrease) in Net Assets:                                                         2008              2007
======================================================================================================================
Operations
- ----------------------------------------------------------------------------------------------------------------------
                                                                                                   
Net investment income .............................................................    $  17,111,582     $  19,423,516
Net realized gain .................................................................           31,548             2,576
Net change in unrealized appreciation/depreciation ................................          289,536           151,984
                                                                                       -------------------------------
Net increase in net assets resulting from operations ..............................       17,432,666        19,578,076
                                                                                       -------------------------------
======================================================================================================================
Dividends and Distributions to Shareholders from
- ----------------------------------------------------------------------------------------------------------------------
Net investment income:
    Class 1 .......................................................................         (315,273)         (511,697)
    Class 2 .......................................................................       (2,758,865)       (3,778,640)
    Class 3 .......................................................................       (6,009,348)       (7,008,543)
    Class 4 .......................................................................       (8,028,096)       (8,124,636)
Net realized gain:
    Class 1 .......................................................................               --               (38)
    Class 2 .......................................................................               --              (219)
    Class 3 .......................................................................               --              (332)
    Class 4 .......................................................................               --              (360)
                                                                                       -------------------------------
Decrease in net assets resulting from dividends and distributions to shareholders .      (17,111,582)      (19,424,465)
                                                                                       -------------------------------
======================================================================================================================
Beneficial Interest Transactions
- ----------------------------------------------------------------------------------------------------------------------
Net increase (decrease) in net assets derived from beneficial interest transactions       48,665,561       (40,234,908)
                                                                                       -------------------------------
======================================================================================================================
Net Assets
- ----------------------------------------------------------------------------------------------------------------------
Total increase (decrease) in net assets ...........................................       48,986,645       (40,081,297)
Beginning of year .................................................................      460,905,426       500,986,723
                                                                                       -------------------------------
End of year .......................................................................    $ 509,892,071     $ 460,905,426
                                                                                       ===============================


See Notes to Financial Statements.


6           WCMA GOVERNMENT SECURITIES FUND           MARCH 31, 2008


Financial Highlights                             WCMA Government Securities Fund



                                                                                 Class 1
                                               --------------------------------------------------------------------------
                                                                          Year Ended March 31,
                                               --------------------------------------------------------------------------
                                                  2008            2007            2006            2005            2004
=========================================================================================================================
Per Share Operating Performance
- -------------------------------------------------------------------------------------------------------------------------
                                                                                                
Net asset value, beginning of year ........    $     1.00      $     1.00      $     1.00      $     1.00      $     1.00
                                               --------------------------------------------------------------------------
Net investment income .....................        0.0274          0.0351          0.0199          0.0027          0.0004
Net realized and unrealized gain (loss) ...        0.0013          0.0003          0.0001         (0.0012)        (0.0002)
                                               --------------------------------------------------------------------------
Net increase from investment operations ...        0.0287          0.0354          0.0200          0.0015          0.0002
                                               --------------------------------------------------------------------------
Dividends and distributions from:
    Net investment income .................       (0.0274)        (0.0351)        (0.0199)        (0.0027)        (0.0004)
    Net realized gain .....................            --              -- 1            -- 1            -- 1       (0.0001)
                                               --------------------------------------------------------------------------
Total dividends and distributions .........       (0.0274)        (0.0351)        (0.0199)        (0.0027)        (0.0005)
                                               --------------------------------------------------------------------------
Net asset value, end of year ..............    $     1.00      $     1.00      $     1.00      $     1.00      $     1.00
                                               ==========================================================================
=========================================================================================================================
Total Investment Return
- -------------------------------------------------------------------------------------------------------------------------
Total investment return ...................          2.77%           3.55%           2.01%           0.27%           0.05%
                                               ==========================================================================
=========================================================================================================================
Ratios to Average Net Assets 2
- -------------------------------------------------------------------------------------------------------------------------
Total expenses after waiver ...............          1.62%           1.59%           1.59%           1.41%           1.09%
                                               ==========================================================================
Total expenses ............................          1.62%           1.59%           1.59%           1.60%           1.58%
                                               ==========================================================================
Net investment income and net realized gain          2.68%           3.51%           1.99%           0.24%           0.04%
                                               ==========================================================================
=========================================================================================================================
Supplemental Data
- -------------------------------------------------------------------------------------------------------------------------
Net assets, end of year (000) .............    $   10,544      $   11,122      $   18,837      $   16,718      $   22,260
                                               ==========================================================================


1     Amount is less than $(0.0001) per share.
2     Includes the Fund's share of the Master LLC's allocated expenses and/or
      net investment income and net realized gain.

See Notes to Financial Statements.


           WCMA GOVERNMENT SECURITIES FUND           MARCH 31, 2008           7


Financial Highlights (continued)                 WCMA Government Securities Fund



                                                                                 Class 2
                                               --------------------------------------------------------------------------
                                                                          Year Ended March 31,
                                               --------------------------------------------------------------------------
                                                  2008            2007            2006            2005            2004
=========================================================================================================================
Per Share Operating Performance
- -------------------------------------------------------------------------------------------------------------------------
                                                                                                
Net asset value, beginning of year ........    $     1.00      $     1.00      $     1.00      $     1.00      $     1.00
                                               --------------------------------------------------------------------------
Net investment income .....................        0.0336          0.0407          0.0259          0.0070          0.0015
Net realized and unrealized gain (loss) ...        0.0011          0.0004          0.0001         (0.0011)        (0.0001)
                                               --------------------------------------------------------------------------
Net increase from investment operations ...        0.0347          0.0411          0.0260          0.0059          0.0014
                                               --------------------------------------------------------------------------
Dividends and distributions from:
    Net investment income .................       (0.0336)        (0.0407)        (0.0259)        (0.0070)        (0.0015)
    Net realized gain .....................            --              -- 1            -- 1            -- 1       (0.0001)
                                               --------------------------------------------------------------------------
Total dividends and distributions .........       (0.0336)        (0.0407)        (0.0259)        (0.0070)        (0.0016)
                                               --------------------------------------------------------------------------
Net asset value, end of year ..............    $     1.00      $     1.00      $     1.00      $     1.00      $     1.00
                                               ==========================================================================
=========================================================================================================================
Total Investment Return
- -------------------------------------------------------------------------------------------------------------------------
Total investment return ...................          3.41%           4.13%           2.63%           0.70%           0.16%
                                               ==========================================================================
=========================================================================================================================
Ratios to Average Net Assets 2
- -------------------------------------------------------------------------------------------------------------------------
Total expenses after waiver ...............          1.00%           1.03%           0.99%           0.98%           0.97%
                                               ==========================================================================
Total expenses ............................          1.26%           1.28%           1.27%           1.28%           1.26%
                                               ==========================================================================
Net investment income and net realized gain          3.32%           4.07%           2.58%           0.68%           0.15%
                                               ==========================================================================
=========================================================================================================================
Supplemental Data
- -------------------------------------------------------------------------------------------------------------------------
Net assets, end of year (000) .............    $   88,881      $   82,655      $  115,872      $  119,718      $  137,566
                                               ==========================================================================


1     Amount is less than $(0.0001) per share.
2     Includes the Fund's share of the Master LLC's allocated expenses and/or
      net investment income and net realized gain.

See Notes to Financial Statements.


8           WCMA GOVERNMENT SECURITIES FUND           MARCH 31, 2008


Financial Highlights (continued)                 WCMA Government Securities Fund



                                                                                 Class 3
                                               --------------------------------------------------------------------------
                                                                          Year Ended March 31,
                                               --------------------------------------------------------------------------
                                                  2008            2007            2006            2005            2004
=========================================================================================================================
Per Share Operating Performance
- -------------------------------------------------------------------------------------------------------------------------
                                                                                                
Net asset value, beginning of year ........    $     1.00      $     1.00      $     1.00      $     1.00      $     1.00
                                               --------------------------------------------------------------------------
Net investment income .....................        0.0368          0.0439          0.0291          0.0102          0.0047
Net realized and unrealized gain (loss) ...        0.0010          0.0004          0.0001         (0.0010)        (0.0001)
                                               --------------------------------------------------------------------------
Net increase from investment operations ...        0.0378          0.0443          0.0292          0.0092          0.0046
                                               --------------------------------------------------------------------------
Dividends and distributions from:
    Net investment income .................       (0.0368)        (0.0439)        (0.0291)        (0.0102)        (0.0047)
    Net realized gain .....................            --              -- 1            -- 1            -- 1       (0.0001)
                                               --------------------------------------------------------------------------
Total dividends and distributions .........       (0.0368)        (0.0439)        (0.0291)        (0.0102)        (0.0048)
                                               --------------------------------------------------------------------------
Net asset value, end of year ..............    $     1.00      $     1.00      $     1.00      $     1.00      $     1.00
                                               ==========================================================================
=========================================================================================================================
Total Investment Return
- -------------------------------------------------------------------------------------------------------------------------
Total investment return ...................          3.74%           4.47%           2.96%           1.03%           0.48%
                                               ==========================================================================
=========================================================================================================================
Ratios to Average Net Assets 2
- -------------------------------------------------------------------------------------------------------------------------
Total expenses after waiver ...............          0.68%           0.71%           0.67%           0.66%           0.65%
                                               ==========================================================================
Total expenses ............................          0.96%           0.98%           0.97%           0.98%           0.96%
                                               ==========================================================================
Net investment income and net realized gain          3.67%           4.41%           2.88%           1.01%           0.48%
                                               ==========================================================================
=========================================================================================================================
Supplemental Data
- -------------------------------------------------------------------------------------------------------------------------
Net assets, end of year (000) .............    $  154,833      $  158,327      $  158,500      $  193,195      $  224,278
                                               ==========================================================================


1     Amount is less than $(0.0001) per share.
2     Includes the Fund's share of the Master LLC's allocated expenses and/or
      net investment income and net realized gain.

See Notes to Financial Statements.


           WCMA GOVERNMENT SECURITIES FUND           MARCH 31, 2008           9


Financial Highlights (concluded)                 WCMA Government Securities Fund



                                                                                 Class 4
                                               --------------------------------------------------------------------------
                                                                          Year Ended March 31,
                                               --------------------------------------------------------------------------
                                                  2008            2007            2006            2005            2004
=========================================================================================================================
Per Share Operating Performance
- -------------------------------------------------------------------------------------------------------------------------
                                                                                                
Net asset value, beginning of year ........    $     1.00      $     1.00      $     1.00      $     1.00      $     1.00
                                               --------------------------------------------------------------------------
Net investment income .....................        0.0368          0.0439          0.0291          0.0102          0.0047
Net realized and unrealized gain (loss) ...        0.0003          0.0003          0.0002         (0.0012)             -- 1
                                               --------------------------------------------------------------------------
Net increase from investment operations ...        0.0371          0.0442          0.0293          0.0090          0.0047
                                               --------------------------------------------------------------------------
Dividends and distributions from:
    Net investment income .................       (0.0368)        (0.0439)        (0.0291)        (0.0102)        (0.0047)
    Net realized gain .....................            --              -- 2            -- 2            -- 2            -- 2
                                               --------------------------------------------------------------------------
Total dividends and distributions .........       (0.0368)        (0.0439)        (0.0291)        (0.0102)        (0.0047)
                                               --------------------------------------------------------------------------
Net asset value, end of year ..............    $     1.00      $     1.00      $     1.00      $     1.00      $     1.00
                                               ==========================================================================
=========================================================================================================================
Total Investment Return
- -------------------------------------------------------------------------------------------------------------------------
Total investment return ...................          3.74%           4.47%           2.96%           1.03%           0.47%
                                               ==========================================================================
=========================================================================================================================
Ratios to Average Net Assets 3
- -------------------------------------------------------------------------------------------------------------------------
Total expenses after waiver ...............          0.68%           0.71%           0.67%           0.66%           0.65%
                                               ==========================================================================
Total expenses ............................          0.95%           0.98%           0.98%           0.97%           0.96%
                                               ==========================================================================
Net investment income and net realized gain          3.59%           4.41%           3.10%           0.91%           0.48%
                                               ==========================================================================
=========================================================================================================================
Supplemental Data
- -------------------------------------------------------------------------------------------------------------------------
Net assets, end of year (000) .............    $  255,634      $  208,801      $  207,778      $   81,344      $  157,203
                                               ==========================================================================


1     Amount is less than $0.0001 per share.
2     Amount is less than $(0.0001) per share.
3     Includes the Fund's share of the Master LLC's allocated expenses and/or
      net investment income and net realized gain.

See Notes to Financial Statements.


10           WCMA GOVERNMENT SECURITIES FUND           MARCH 31, 2008


Notes to Financial Statements                    WCMA Government Securities Fund

1. Significant Accounting Policies:

WCMA Government Securities Fund (the "Fund") is registered under the Investment
Company Act of 1940, as amended (the "1940 Act"), as a no load, diversified,
open-end management investment company. The Fund seeks to achieve its investment
objective by investing all of its assets in Master Government Securities LLC
(the "Master LLC"), which has the same investment objective and strategies as
the Fund. Effective June 15, 2007, the Master LLC was converted from a Delaware
statutory trust to a Delaware limited liability company. The value of the Fund's
investment in the Master LLC reflects the Fund's proportionate interest in the
net assets of the Master LLC. The performance of the Fund is directly affected
by the performance of the Master LLC. The financial statements of the Master
LLC, including the Schedule of Investments, are included elsewhere in this
report and should be read in conjunction with the Fund's financial statements.
The Fund's financial statements are prepared in conformity with accounting
principles generally accepted in the United States of America, which may require
the use of management accruals and estimates. Actual results may differ from
these estimates. The percentage of the Master LLC owned by the Fund at March 31,
2008 was 39.0%. The Fund is divided into four classes, designated Class 1, Class
2, Class 3 and Class 4. Each Class 1, Class 2, Class 3 and Class 4 share
represents interests in the same assets of the Fund and has identical voting,
dividend, liquidation and other rights and the same terms and conditions, except
that each class bears certain expenses related to service and the distribution
of such shares and the additional incremental transfer agency costs resulting
from the conversion of shares and has exclusive voting with respect to matters
relating to such shareholder services and distribution expenditures.

The following is a summary of significant accounting policies followed by the
Fund:

Valuation of Investments: The Fund records its investments in the Master LLC at
fair value. Valuation of securities held by the Master LLC is discussed in Note
1 of the Master LLC's Notes to Financial Statements, which are included
elsewhere in this report.

Investment Transactions and Net Investment Income: Investment transactions in
the Master LLC are accounted for on a trade date basis. The Fund records daily
its proportionate share of the Master LLC's income, expenses and realized gains
and losses. In addition, the Fund accrues its own income and expenses. Income
and realized gains and losses on investments are allocated daily to each class
based on its relative net assets.

Dividends and Distributions to Shareholders: Dividends from net investment
income are declared and reinvested daily and paid monthly. Distributions of
realized gains, if any, are recorded on the ex-dividend dates.

Income Taxes: It is the Fund's policy to comply with the requirements of the
Internal Revenue Code applicable to regulated investment companies and to
distribute substantially all of its taxable income to its shareholders.
Therefore, no federal income tax provision is required.

Effective September 28, 2007, the Fund implemented Financial Accounting
Standards Board ("FASB") Interpretation No. 48, "Accounting for Uncertainty in
Income Taxes -- an interpretation of FASB Statement No. 109" ("FIN 48"). FIN 48
prescribes the minimum recognition threshold a tax position must meet in
connection with accounting for uncertainties in income tax positions taken or
expected to be taken by an entity, including investment companies, before being
measured and recognized in the financial statements. The administrator has
evaluated the application of FIN 48 to the Fund, and has determined that the
adoption of FIN 48 did not have a material impact on the Fund's financial
statements. The Fund files U.S. federal and various state and local tax returns.
No income tax returns are currently under examination. The statute of
limitations on the Fund's U.S. federal tax returns remains open for the years
ended March 31, 2005 through March 31, 2007. The statutes of limitations on the
Fund's state and local tax returns may remain open for an additional year
depending upon the jurisdiction.

Recent Accounting Pronouncements: In September 2006, Statement of Financial
Accounting Standards No. 157, "Fair Value Measurements" ("FAS 157"), was issued
and is effective for fiscal years beginning after November 15, 2007. FAS 157
defines fair value, establishes a framework for measuring fair value and expands
disclosures about fair value measurements. The impact on the Fund's financial
statement disclosures, if any, is currently being assessed.

In addition, in February 2007, Statement of Financial Accounting Standards No.
159, "The Fair Value Option for Financial Assets and Financial Liabilities"
("FAS 159"), was issued and is effective for fiscal years beginning after
November 15, 2007. FAS 159 permits entities to choose to measure many financial
instruments and certain other items at fair value that are not currently
required to be measured at fair value. FAS 159 also establishes presentation and
disclosure requirements designed to facilitate comparisons between entities that
choose different measurement attributes for similar types of assets and
liabilities. The impact on the Fund's financial statement disclosures, if any,
is currently being assessed.

In March 2008, Statement of Financial Accounting Standards No. 161, "Disclosures
about Derivative Instruments and Hedging Activities -- an amendment of FASB
Statement No. 133" ("FAS 161") was issued and is effective for fiscal years
beginning after November 15, 2008. FAS 161 is intended to improve financial
reporting for derivative instruments by


           WCMA GOVERNMENT SECURITIES FUND           MARCH 31, 2008           11


Notes to Financial Statements (continued)        WCMA Government Securities Fund

requiring enhanced disclosure that enables investors to understand how and why
an entity uses derivatives, how derivatives are accounted for, and how
derivative instruments affect an entity's results of operations and financial
position. The administrator is currently evaluating the implications of FAS 161
and the impact on the Fund's financial statement disclosures, if any, is
currently being assessed.

Other: Expenses directly related to the Fund or its classes are charged to that
Fund or class. Other operating expenses shared by several funds are pro-rated
among those funds on the basis of relative net assets or other appropriate
methods. Other expenses of the Fund are allocated daily to each class based on
its relative net assets.

2. Transactions with Affiliates:

The Fund entered into an Administration Agreement with BlackRock Advisors, LLC
(the "Administrator"), an indirect, wholly owned subsidiary of BlackRock, Inc.,
to provide administrative services (other than investment advice and related
portfolio activities). For such services, the Fund pays a monthly fee at an
annual rate of 0.25% of the Fund's average daily net assets. Merrill Lynch &
Co., Inc. ("Merrill Lynch") and The PNC Financial Services Group, Inc. ("PNC")
are principal owners of BlackRock, Inc.

The Fund has entered into a Distribution Agreement and a Distribution and
Shareholder Servicing Plan (the "Distribution Plan") with Merrill Lynch, Pierce,
Fenner & Smith Incorporated ("MLPF&S"), a wholly owned subsidiary of Merrill
Lynch, and/or affiliates of PNC or Merrill Lynch (including BlackRock, Inc.).

Pursuant to the Distribution Plan adopted by the Fund in accordance with Rule
12b-1 under the 1940 Act, the Fund pays MLPF&S service fees and distribution
fees. The fees are accrued daily and paid monthly at annual rates based upon the
average daily net assets of the shares of the Fund as follows:

- --------------------------------------------------------------------------------
                                                    Service         Distribution
                                                      Fee               Fee
- --------------------------------------------------------------------------------
Class 1 ..........................................   0.25%             0.750%
Class 2 ..........................................   0.25%             0.425%
Class 3 ..........................................   0.25%             0.125%
Class 4 ..........................................   0.25%             0.125%
- --------------------------------------------------------------------------------

The ongoing service fee compensates MLPF&S for providing shareholder services to
shareholders. The ongoing distribution fee compensates MLPF&S for providing
distribution related services to shareholders. The Fund has entered into a
contractual arrangement with the Administrator and MLPF&S to waive and/or
reimburse a portion of the Fund's fees and expenses to ensure that the net
expenses for the Fund's Class 2 Shares is 0.32% higher than that of CMA
Government Securities Fund, and Class 3 and Class 4 Shares is equal to that of
CMA Government Securities Fund. The fee/expense waiver or reimbursement includes
service and distribution fees. This arrangement has a one-year term and is
renewable. For the year ended March 31, 2008, MLPF&S earned fees of $2,106,697,
of which $1,271,834 was waived.

Financial Data Services, Inc. ("FDS"), a wholly owned subsidiary of Merrill
Lynch and an affiliate of the Administrator, serves as transfer agent. Interest
is earned by the Fund from FDS based on the difference, if any, between
estimated and actual daily beneficial share activity, which results in
uninvested net proceeds from sales of Fund shares.

Certain officers and/or directors of the Fund are officers and/or directors of
BlackRock, Inc. or its affiliates.

3. Shares of Beneficial Interest:

Transactions in shares of beneficial interests for each class were as follows:

- --------------------------------------------------------------------------------
Class 1 Shares for the Year
Ended March 31, 2008                             Shares              Amount
- --------------------------------------------------------------------------------
Shares sold ............................        121,626,056     $   121,626,056
Shares issued to shareholders in
  reinvestment of dividends ............            315,273             315,273
                                            -----------------------------------
Total issued ...........................        121,941,329         121,941,329
Shares redeemed ........................       (122,533,816)       (122,533,816)
                                            -----------------------------------
Net decrease ...........................           (592,487)    $      (592,487)
                                            ===================================

- --------------------------------------------------------------------------------
Class 1 Shares for the Year
Ended March 31, 2007                             Shares              Amount
- --------------------------------------------------------------------------------
Shares sold ............................        185,188,568     $   185,188,568
Shares issued to shareholders in
  reinvestment of dividends
  and distributions ....................            511,728             511,728
                                            -----------------------------------
Total issued ...........................        185,700,296         185,700,296
Shares redeemed ........................       (193,419,437)       (193,419,437)
                                            -----------------------------------
Net decrease ...........................         (7,719,141)    $    (7,719,141)
                                            ===================================

- --------------------------------------------------------------------------------
Class 2 Shares for the Year
Ended March 31, 2008                             Shares              Amount
- --------------------------------------------------------------------------------
Shares sold ............................        527,715,700     $   527,715,700
Shares issued to shareholders in
  reinvestment of dividends ............          2,758,865           2,758,865
                                            -----------------------------------
Total issued ...........................        530,474,565         530,474,565
Shares redeemed ........................       (524,336,137)       (524,336,137)
                                            -----------------------------------
Net increase ...........................          6,138,428     $     6,138,428
                                            ===================================

- --------------------------------------------------------------------------------
Class 2 Shares for the Year
Ended March 31, 2007                             Shares              Amount
- --------------------------------------------------------------------------------
Shares sold ............................        551,349,244     $   551,349,244
Shares issued to shareholders in
  reinvestment of dividends
  and distributions ....................          3,778,866           3,778,866
                                            -----------------------------------
Total issued ...........................        555,128,110         555,128,110
Shares redeemed ........................       (588,378,499)       (588,378,499)
                                            -----------------------------------
Net decrease ...........................        (33,250,389)    $   (33,250,389)
                                            ===================================


12           WCMA GOVERNMENT SECURITIES FUND           MARCH 31, 2008


Notes to Financial Statements (concluded)        WCMA Government Securities Fund

- --------------------------------------------------------------------------------
Class 3 Shares for the Year
Ended March 31, 2008                             Shares              Amount
- --------------------------------------------------------------------------------
Shares sold ............................      1,037,700,677     $ 1,037,700,677
Shares issued to shareholders in
  reinvestment of dividends ............          6,009,348           6,009,348
                                            -----------------------------------
Total issued ...........................      1,043,710,025       1,043,710,025
Shares redeemed ........................     (1,047,361,189)     (1,047,361,189)
                                            -----------------------------------
Net decrease ...........................         (3,651,164)    $    (3,651,164)
                                            ===================================

- --------------------------------------------------------------------------------
Class 3 Shares for the Year
Ended March 31, 2007                             Shares              Amount
- --------------------------------------------------------------------------------
Shares sold ............................      1,183,649,416     $ 1,183,649,416
Shares issued to shareholders in
  reinvestment of dividends
  and distributions ....................          7,008,875           7,008,875
                                            -----------------------------------
Total issued ...........................      1,190,658,291       1,190,658,291
Shares redeemed ........................     (1,190,888,128)     (1,190,888,128)
                                            -----------------------------------
Net decrease ...........................           (229,837)    $      (229,837)
                                            ===================================

- --------------------------------------------------------------------------------
Class 4 Shares for the Year
Ended March 31, 2008                             Shares              Amount
- --------------------------------------------------------------------------------
Shares sold ............................      1,722,710,820     $ 1,722,710,820
Shares issued to shareholders in
  reinvestment of dividends ............          8,028,096           8,028,096
                                            -----------------------------------
Total issued ...........................      1,730,738,916       1,730,738,916
Shares redeemed ........................     (1,683,968,132)     (1,683,968,132)
                                            -----------------------------------
Net increase ...........................         46,770,784     $    46,770,784
                                            ===================================

- --------------------------------------------------------------------------------
Class 4 Shares for the Year
Ended March 31, 2007                             Shares              Amount
- --------------------------------------------------------------------------------
Shares sold ............................      1,149,612,238     $ 1,149,612,238
Shares issued to shareholders in
  reinvestment of dividends
  and distributions ....................          8,124,996           8,124,996
                                            -----------------------------------
Total issued ...........................      1,157,737,234       1,157,737,234
Shares redeemed ........................     (1,156,772,775)     (1,156,772,775)
                                            -----------------------------------
Net increase ...........................            964,459     $       964,459
                                            ===================================

4. Income Tax Information:

The tax character of distributions paid during the fiscal years ended
March 31, 2008 and March 31, 2007 were as follows:

- --------------------------------------------------------------------------------
                                                       3/31/2008       3/31/2007
- --------------------------------------------------------------------------------
Distributions paid from:
  Ordinary income ................................   $17,111,582     $19,424,465
                                                     ---------------------------
Total taxable distributions ......................   $17,111,582     $19,424,465
                                                     ===========================

As of March 31, 2008, the components of accumulated earnings on a tax basis were
as follows:

- --------------------------------------------------------------------------------
Undistributed net ordinary income ................................    $ 35,035
Undistributed net long-term capital gains ........................          --
                                                                      --------
Total undistributed net earnings .................................      35,035
Net unrealized losses ............................................      (1,860)*
                                                                      --------
Total accumulated net earnings ...................................    $ 33,175
                                                                      ========

*     The difference between book-basis and tax-basis net unrealized losses is
      attributable primarily to the tax deferral of losses on wash sales.


           WCMA GOVERNMENT SECURITIES FUND           MARCH 31, 2008           13


Report of Independent Registered Public Accounting Firm
                                                 WCMA Government Securities Fund

To the Shareholders and Board of Directors of
WCMA Government Securities Fund:

We have audited the accompanying statement of assets and liabilities of WCMA
Government Securities Fund (the "Fund") as of March 31, 2008, and the related
statement of operations for the year then ended, the statements of changes in
net assets for each of the two years in the period then ended, and the financial
highlights for each of the five years in the period then ended. These financial
statements and financial highlights are the responsibility of the Fund's
management. Our responsibility is to express an opinion on these financial
statements and financial highlights based on our audits.

We conducted our audits in accordance with the standards of the Public Company
Accounting Oversight Board (United States). Those standards require that we plan
and perform the audit to obtain reasonable assurance about whether the financial
statements and financial highlights are free of material misstatement. The Fund
is not required to have, nor were we engaged to perform, an audit of internal
control over financial reporting. Our audits included consideration of internal
control over financial reporting as a basis for designing audit procedures that
are appropriate in the circumstances, but not for the purpose of expressing an
opinion on the effectiveness of the Fund's internal control over financial
reporting. Accordingly, we express no such opinion. An audit also includes
examining, on a test basis, evidence supporting the amounts and disclosures in
the financial statements, assessing the accounting principles used and
significant estimates made by management, as well as evaluating the overall
financial statement presentation. We believe that our audits provide a
reasonable basis for our opinion.

In our opinion, the financial statements and financial highlights referred to
above present fairly, in all material respects, the financial position of WCMA
Government Securities Fund as of March 31, 2008, the results of its operations
for the year then ended, the changes in its net assets for each of the two years
in the period then ended, and the financial highlights for each of the five
years in the period then ended, in conformity with accounting principles
generally accepted in the United States of America.

Deloitte & Touche LLP
Princeton, New Jersey
May 27, 2008

Important Tax Information (Unaudited)

The following information is provided with respect to the ordinary income
distributions paid by WCMA Government Securities Fund for the fiscal year ended
March 31, 2008:

- --------------------------------------------------------------------------------
                           Federal Obligation Interest
- --------------------------------------------------------------------------------
Months Paid:  April 2007 - March 2008 ...............................   20.90%*
- --------------------------------------------------------------------------------
                Interest-Related Dividends for Non-U.S. Residents
- --------------------------------------------------------------------------------
Months Paid:  April 2007 - December 2007 ............................   99.46%**
              January 2008 - March 2008 .............................   97.67%**
- --------------------------------------------------------------------------------

*     The law varies in each state as to whether and what percentage of dividend
      income attributable to federal obligations is exempt from state income
      tax. We recommend that you consult your tax advisor to determine if any
      portion of the dividends you received is exempt from state income taxes.
**    Represents the portion of the taxable ordinary income dividends eligible
      for exemption from U.S. withholding tax for nonresident aliens and foreign
      corporations.


14           WCMA GOVERNMENT SECURITIES FUND           MARCH 31, 2008


Portfolio Summary                               Master Government Securities LLC

Portfolio Composition as a Percent of Net Assets

                                                         3/31/08         3/31/07
- --------------------------------------------------------------------------------
Repurchase Agreements ................................       71%             78%
U.S. Government Obligations ..........................       33              22
Liabilities in Excess of Other Assets ................       (4%)            --
                                                         -----------------------
Total ................................................      100%            100%
                                                         =======================


           WCMA GOVERNMENT SECURITIES FUND           MARCH 31, 2008           15


Schedule of Investments March 31, 2008
    Master Government Securities LLC (Percentages shown are based on Net Assets)



                      Interest          Maturity             Par
  Issue                 Rate              Date              (000)          Value
=====================================================================================
U.S. Government Obligations* -- 33.2%
=====================================================================================
                                                          
U.S. Treasury Bills     1.25-
                        3.20 %          4/03/2008         $79,597     $    79,582,921
                        3.197           4/10/2008          25,000          24,977,799
                        0.35-
                        2.40            4/15/2008          60,662          60,624,255
                        0.35-
                        2.252           4/17/2008          74,549          74,499,858
                        2.263           4/24/2008           9,191           9,177,134
                        2.04-
                        2.168           5/01/2008          51,526          51,432,839
                        0.810-
                        2.20            5/08/2008          60,170          60,074,538
                        0.98            6/19/2008          25,000          24,945,556
                        1.30            7/03/2008          50,000          49,835,694
- -------------------------------------------------------------------------------------
Total U.S. Government Obligations
(Cost -- $435,150,594)...........................................         435,150,594
- -------------------------------------------------------------------------------------

Issue
=====================================================================================
Repurchase Agreements** -- 70.4%
=====================================================================================
Banc of America Securities LLC, purchased on
3/26/2008 to yield 1.50% to 4/02/2008, repurchase
price $68,519,979, collateralized by GNMA,
5% - 6.50% due 11/15/2019 to 3/20/2038 ................    68,500          68,500,000
- -------------------------------------------------------------------------------------
Barclays Capital Inc., purchased on 3/31/2008 to
yield 1.45% to 4/01/2008, repurchase price
$66,802,691, collateralized by U.S. Treasury Inflation
Bond, 3% - 3.50% due 1/15/2011 to 7/15/2012 ...........    66,800          66,800,000
- -------------------------------------------------------------------------------------
Citigroup Global Markets Inc., purchased on
3/26/2008 to yield 2% to 4/02/2008, repurchase
price $68,526,639, collateralized by GNMA, 6%
due 3/20/2038 .........................................    68,500          68,500,000
- -------------------------------------------------------------------------------------
Credit Suisse Securities (USA) LLC, purchased on
1/02/2008 to yield 4.10% to 4/01/2008, repurchase
price $55,159,650, collateralized by GNMA, 5% - 7%
due 7/20/2032 to 2/20/2038 ............................    54,600          54,600,000
- -------------------------------------------------------------------------------------
Deutsche Bank Securities Inc., purchased on
3/26/2008 to yield 1.85% to 4/02/2008, repurchase
price $68,524,641, collateralized by GNMA,
4.50% - 7% due 1/15/2033 to 3/15/2038 .................    68,500          68,500,000
- -------------------------------------------------------------------------------------
Goldman Sachs & Co., Inc., purchased on 1/16/2008
to yield 3.70% to 4/16/2008, repurchase price
$56,120,014, collateralized by GNMA, 4.50% - 7.50%
due 7/20/2025 to 2/20/2037 ............................    55,600          55,600,000
- -------------------------------------------------------------------------------------
Greenwich Capital Markets, Inc., purchased on
3/26/2008 to yield 2.10% to 4/02/2008, repurchase
price $68,527,971, collateralized by GNMA,
4.50% - 12% due 8/15/2008 to 3/20/2038 ................    68,500          68,500,000
- -------------------------------------------------------------------------------------
HSBC Securities (USA) Inc., purchased on 3/31/2008
to yield 1.45% to 4/01/2008, repurchase price
$66,802,691, collateralized by U.S. Treasury Bond,
4.375% due 2/15/2038 ..................................    66,800          66,800,000
- -------------------------------------------------------------------------------------
J.P. Morgan Securities Inc., purchased on 3/25/2008
to yield 1.75% to 4/01/2008, repurchase price
$68,023,139, collateralized by GNMA,
4.50% - 11.50% due 9/15/2008 to 3/20/2038 .............    68,000          68,000,000
- -------------------------------------------------------------------------------------
Lehman Brothers Inc., purchased on 3/31/2008 to
yield 1.80% to 4/01/2008, repurchase price
$66,803,340, collateralized by GNMA, 4% - 9%
due 3/15/2013 to 3/15/2038 ............................    66,800          66,800,000
- -------------------------------------------------------------------------------------
Merrill Lynch Government Securities Inc., purchased on
3/26/2008 to yield 1.55% to 4/02/2008, repurchase
price $68,520,645, collateralized by GNMA,
5.50% - 6% due 6/15/2034 to 9/15/2036 (a) .............    68,500          68,500,000
- -------------------------------------------------------------------------------------
Mizuho Securities USA Inc., purchased on 3/31/2008
to yield 1.40% to 4/01/2008, repurchase price
$66,802,598, collateralized by U.S. Treasury Bill, due
6/12/2008 to 8/21/2008 ................................    66,800          66,800,000
- -------------------------------------------------------------------------------------
Morgan Stanley & Co. Incorporated, purchased on
3/31/2008 to yield 1.35% to 4/01/2008, repurchase
price $66,802,505, collateralized by U.S. Treasury
STRIPS+, due 2/15/2025 to 5/15/2025 ...................    66,800          66,800,000
- -------------------------------------------------------------------------------------
UBS Securities LLC, purchased on 3/17/2008 to yield
1.65% to 6/16/2008, repurchase price $66,275,275,
collateralized by GNMA, 3.50% - 13%
due 6/15/2008 to 9/15/2041 ............................    66,000          66,000,000
- -------------------------------------------------------------------------------------
Total Repurchase Agreements
(Cost -- $920,700,000) ..........................................         920,700,000
- -------------------------------------------------------------------------------------
Total Investments (Cost -- $1,355,850,594***) -- 103.6% .........       1,355,850,594

Liabilities in Excess of Other Assets -- (3.6%) .................         (47,728,427)
                                                                      ---------------
Net Assets -- 100.0% ............................................     $ 1,308,122,167
                                                                      ===============


*     U.S. Treasury Bills are traded on a discount basis; the interest rates
      shown are the range of discount rates paid at the time of purchase by the
      Master LLC.
**    Repurchase Agreements are fully collateralized by U.S. Government
      Obligations.
***   Cost for federal income tax purposes.
+     Separately Traded Registered Interest and Principal of Securities
      (STRIPS).
(a)   Investments in companies considered to be an affiliate of the Master LLC,
      for purposes of Section 2(a)(3) of the Investment Company Act of 1940,
      were as follows:
      --------------------------------------------------------------------------
                                                        Net            Interest
      Affiliate                                    Activity (000)       Income
      --------------------------------------------------------------------------
      Merrill Lynch Government Securities Inc.        $19,600         $2,314,618
      --------------------------------------------------------------------------

      See Notes to Financial Statements.


16           WCMA GOVERNMENT SECURITIES FUND           MARCH 31, 2008


Statement of Assets and Liabilities

March 31, 2008                                  Master Government Securities LLC
================================================================================
Assets
- --------------------------------------------------------------------------------
Investments at value -- unaffiliated (cost -- $1,287,350,594)   $ 1,287,350,594
Investments at value -- affiliated (cost -- $68,500,000) ....        68,500,000
Cash ........................................................               355
Contributions receivable ....................................         1,257,792
Interest receivable (including $14,747 from affiliates) .....         1,129,823
Prepaid expenses ............................................            23,159
                                                                ---------------
Total assets ................................................     1,358,261,723
                                                                ---------------
================================================================================
Liabilities
- --------------------------------------------------------------------------------
Investments purchased payable ...............................        49,835,694
Investment advisory fees payable ............................           212,879
Other affiliates payable ....................................            10,083
Other accrued expenses payable ..............................            80,900
                                                                ---------------
Total liabilities ...........................................        50,139,556
                                                                ---------------
================================================================================
Net Assets
- --------------------------------------------------------------------------------
Net Assets ..................................................   $ 1,308,122,167
                                                                ===============
================================================================================
Net Assets Consist of
- --------------------------------------------------------------------------------
Investors' capital ..........................................   $ 1,308,122,167
                                                                ===============

Statement of Operations

Year Ended March 31, 2008                       Master Government Securities LLC
================================================================================
Investment Income
- --------------------------------------------------------------------------------
Interest (includes $2,314,618 from affiliates) ..............   $    45,070,275
================================================================================
Expenses
- --------------------------------------------------------------------------------
Investment advisory .........................................         2,194,232
Accounting services .........................................           184,349
Custodian ...................................................            59,202
Professional ................................................            51,220
Directors ...................................................            30,271
Printing ....................................................               576
Miscellaneous ...............................................            27,556
                                                                ---------------
Total expenses ..............................................         2,547,406
                                                                ---------------
Net investment income .......................................        42,522,869
                                                                ---------------
================================================================================
Realized and Unrealized Gain (Loss)
- --------------------------------------------------------------------------------
Net realized gain on investments ............................            71,881
Net change in unrealized appreciation/depreciation
  on investments ............................................           (27,831)
                                                                ---------------
Total realized and unrealized gain ..........................            44,050
                                                                ---------------
Net Increase in Net Assets Resulting from Operations ........   $    42,566,919
                                                                ===============

See Notes to Financial Statements.


           WCMA GOVERNMENT SECURITIES FUND           MARCH 31, 2008           17


Statements of Changes in Net Assets             Master Government Securities LLC



                                                                                  Year Ended March 31,
                                                                           -----------------------------------
Increase (Decrease) in Net Assets:                                              2008                2007
==============================================================================================================
Operations
- --------------------------------------------------------------------------------------------------------------
                                                                                         
Net investment income .................................................    $    42,522,869     $    45,035,528
Net realized gain .....................................................             71,881               4,743
Net change in unrealized appreciation/depreciation ....................            (27,831)            319,061
                                                                           -----------------------------------
Net increase in net assets resulting from operations ..................         42,566,919          45,359,332
                                                                           -----------------------------------
==============================================================================================================
Capital Transactions
- --------------------------------------------------------------------------------------------------------------
Proceeds from contributions ...........................................      6,967,978,832       5,153,023,736
Fair value of withdrawals .............................................     (6,666,836,245)     (5,202,779,172)
                                                                           -----------------------------------
Net increase (decrease) in net assets derived from capital transactions        301,142,587         (49,755,436)
                                                                           -----------------------------------
==============================================================================================================
Net Assets
- --------------------------------------------------------------------------------------------------------------
Total increase (decrease) in net assets ...............................        343,709,506          (4,396,104)
Beginning of year .....................................................        964,412,661         968,808,765
                                                                           -----------------------------------
End of year ...........................................................    $ 1,308,122,167     $   964,412,661
                                                                           ===================================


Financial Highlights                            Master Government Securities LLC



                                                                        Year Ended March 31,
                                               ----------------------------------------------------------------------
                                                  2008           2007           2006           2005           2004
=====================================================================================================================
Total Investment Return
- ---------------------------------------------------------------------------------------------------------------------
                                                                                            
Total investment return ...................          4.16%          4.90%          3.37%          1.44%          0.94%
                                               ======================================================================
=====================================================================================================================
Ratios to Average Net Assets
- ---------------------------------------------------------------------------------------------------------------------
Total expenses ............................          0.24%          0.26%          0.26%          0.25%          0.22%
                                               ======================================================================
Net investment income and net realized gain          3.99%          4.84%          3.31%          1.39%          0.94%
                                               ======================================================================
=====================================================================================================================
Supplemental Data
- ---------------------------------------------------------------------------------------------------------------------
Net assets, end of year (000) .............    $1,308,122     $  964,413     $  968,809     $  936,566     $1,194,238
                                               ======================================================================


See Notes to Financial Statements.


18           WCMA GOVERNMENT SECURITIES FUND           MARCH 31, 2008


Notes to Financial Statements                   Master Government Securities LLC

1. Significant Accounting Policies:

Master Government Securities LLC (the "Master LLC") is registered under the
Investment Company Act of 1940, as amended (the "1940 Act"), and is organized as
a Delaware limited liability company. Prior to June 15, 2007, the Master LLC was
organized as a Delaware statutory trust (the "Trust"). The Limited Liability
Company Agreement permitted the Directors (and prior to June 15, 2007, the
Declaration of Trust permitted the Trustees) to issue non-transferable interests
in the Master LLC/Trust, subject to certain limitations. Throughout this report,
the Trust and the Master LLC are referred to as the Master LLC and the Board of
Trustees is referred to as the Board of Directors. The Master LLC's financial
statements are prepared in conformity with accounting principles generally
accepted in the United States of America, which may require the use of
management accruals and estimates. Actual results may differ from these
estimates.

The following is a summary of significant accounting policies followed by the
Master LLC:

Valuation of Investments: The Master LLC securities are valued under the
amortized cost method which approximates current market value in accordance with
Rule 2a-7 of the 1940 Act. Under this method, securities are valued at cost when
purchased and thereafter, a constant proportionate amortization of any discount
or premium is recorded until the maturity of the security. Regular review and
monitoring of the valuation is performed in an attempt to avoid dilution or
other unfair results to investors.

Repurchase Agreements: The Master LLC may invest in U.S. government and agency
securities pursuant to repurchase agreements. Under such agreements, the
counterparty agrees to repurchase the security at a mutually agreed upon time
and price. The counterparty will be required on a daily basis to maintain the
value of the securities subject to the agreement at no less than the repurchase
price. The agreements are conditioned upon the collateral being deposited under
the Federal Reserve book entry system or held in a segregated account by the
Master LLC's custodian. If the counterparty defaults and the fair value of the
collateral declines, liquidation of the collateral by the Master LLC may be
delayed or limited.

Income Taxes: The Master LLC is classified as a partnership for federal income
tax purposes. As such, each investor in the Master LLC is treated as owner of
its proportionate share of the net assets, income, expenses and realized gains
and losses of the Master LLC. Therefore, no federal income tax provision is
required. It is intended that the Master LLC's assets will be managed so an
investor in the Master LLC can satisfy the requirements of Subchapter M of the
Internal Revenue Code.

Effective September 28, 2007, the Master LLC implemented Financial Accounting
Standards Board ("FASB") Interpretation No. 48, "Accounting for Uncertainty in
Income Taxes -- an interpretation of FASB Statement No. 109" ("FIN 48"). FIN 48
prescribes the minimum recognition threshold a tax position must meet in
connection with accounting for uncertainties in income tax positions taken or
expected to be taken by an entity, including investment companies, before being
measured and recognized in the financial statements. BlackRock Advisors, LLC
(the "Advisor"), an indirect, wholly owned subsidiary of BlackRock, Inc., has
evaluated the application of FIN 48 to the Master LLC, and has determined that
the adoption of FIN 48 did not have a material impact on the Master LLC's
financial statements. The Master LLC files U.S. federal and various state and
local tax returns. No income tax returns are currently under examination. The
statutes of limitations on the Master LLC's U.S. federal tax returns remains
open for the years ended March 31, 2005 through March 31, 2007. The statutes of
limitations on the Master LLC's state and local tax returns may remain open for
an additional year depending upon the jurisdiction.

Investment Transactions and Investment Income: Investment transactions are
recorded on the dates the transactions are entered into (the trade dates).
Realized gains and losses on security transactions are determined on the
identified cost basis. Interest income is recognized on the accrual basis. The
Master LLC amortizes all premiums and discounts on debt securities.

Recent Accounting Pronouncements: In September 2006, Statement of Financial
Accounting Standards No. 157, "Fair Value Measurements" ("FAS 157"), was issued
and is effective for fiscal years beginning after November 15, 2007. FAS 157
defines fair value, establishes a framework for measuring fair value and expands
disclosures about fair value measurements. The impact on the Master LLC's
financial statement disclosures, if any, is currently being assessed.

In addition, in February 2007, Statement of Financial Accounting Standards No.
159, "The Fair Value Option for Financial Assets and Financial Liabilities"
("FAS 159"), was issued and is effective for fiscal years beginning after
November 15, 2007. FAS 159 permits entities to choose to measure many financial
instruments and certain other items at fair value that are not currently
required to be measured at fair value. FAS 159 also establishes presentation and
disclosure requirements designed to facilitate comparisons between entities that
choose different measurement attributes for similar types of assets and
liabilities. The impact on the Master LLC's financial statement disclosures, if
any, is currently being assessed.

In March 2008, Statement of Financial Accounting Standards No. 161, "Disclosures
about Derivative Instruments and Hedging Activities -- an amendment of FASB
Statement No. 133" ("FAS 161") was issued and is effective for fiscal years
beginning after November 15, 2008. FAS 161 is intended to improve financial
reporting for derivative instruments by requiring enhanced disclosure that
enables investors to understand how and why an entity uses derivatives, how
derivatives are accounted for, and how derivative instruments affect an entity's
results of operations and financial position. Management is currently evaluating
the implications of


           WCMA GOVERNMENT SECURITIES FUND           MARCH 31, 2008           19


Notes to Financial Statements (concluded)       Master Government Securities LLC

FAS 161 and the impact on the Master LLC's financial statement disclosures, if
any, is currently being assessed.

Other: Expenses directly related to the Master LLC are charged to the Master
LLC. Other operating expenses shared by several funds are pro-rated among those
funds on the basis of relative net assets or other appropriate methods.

2. Investment Advisory Agreement and Other Transactions with Affiliates:

The Master LLC entered into an Investment Advisory Agreement with the Advisor to
provide investment advisory and administration services. Merrill Lynch & Co.,
Inc. ("Merrill Lynch") and The PNC Financial Services Group, Inc. are principal
owners of BlackRock, Inc.

The Advisor is responsible for the management of the Master LLC's portfolio and
provides the necessary personnel, facilities and equipment to provide such
services to the Master LLC. The Advisor also performs certain administrative
services necessary for the operation of the Master LLC. For such services, the
Master LLC pays a monthly fee based upon the average daily value of the Master
LLC's net assets at the following annual rates: 0.25% of the Master LLC's
average daily net assets not exceeding $500 million; 0.175% of the average daily
net assets in excess of $500 million, but not exceeding $1 billion; and 0.125%
of the average daily net assets in excess of $1 billion.

In addition, the Advisor has entered into a separate sub-advisory agreement with
BlackRock Institutional Management Corporation ("BIMC"), an affiliate of the
Advisor, under which the Advisor pays BIMC for services it provides, a monthly
fee that is a percentage of the investment advisory fee paid by the Master LLC
to the Advisor. For the year ended March 31, 2008, the Master LLC reimbursed the
Advisor $19,232 for certain accounting services, which is included in accounting
services expenses in the Statement of Operations.

Certain officers and/or directors of the Master LLC are officers and/or
directors of BlackRock, Inc. or its affiliates.


20           WCMA GOVERNMENT SECURITIES FUND           MARCH 31, 2008


Report of Independent Registered Public Accounting Firm
                                                Master Government Securities LLC

To the Investors and Board of Directors of
Master Government Securities LLC:

We have audited the accompanying statement of assets and liabilities, including
the schedule of investments, of Master Government Securities LLC (the "Master
LLC") (formerly Master Government Securities Trust) as of March 31, 2008, and
the related statement of operations for the year then ended, the statements of
changes in net assets for each of the two years in the period then ended, and
the financial highlights for each of the five years in the period then ended.
These financial statements and financial highlights are the responsibility of
the Master LLC's management. Our responsibility is to express an opinion on
these financial statements and financial highlights based on our audits.

We conducted our audits in accordance with the standards of the Public Company
Accounting Oversight Board (United States). Those standards require that we plan
and perform the audit to obtain reasonable assurance about whether the financial
statements and financial highlights are free of material misstatement. The
Master LLC is not required to have, nor were we engaged to perform, an audit of
internal control over financial reporting. Our audits included consideration of
internal control over financial reporting as a basis for designing audit
procedures that are appropriate in the circumstances, but not for the purpose of
expressing an opinion on the effectiveness of the Master LLC's internal control
over financial reporting. Accordingly, we express no such opinion. An audit also
includes examining, on a test basis, evidence supporting the amounts and
disclosures in the financial statements, assessing the accounting principles
used and significant estimates made by management, as well as evaluating the
overall financial statement presentation. Our procedures included confirmation
of securities owned as of March 31, 2008, by correspondence with the custodian
and brokers; where replies were not received from brokers, we performed other
auditing procedures. We believe that our audits provide a reasonable basis for
our opinion.

In our opinion, the financial statements and financial highlights referred to
above present fairly, in all material respects, the financial position of Master
Government Securities LLC as of March 31, 2008, the results of its operations
for the year then ended, the changes in its net assets for each of the two years
in the period then ended, and the financial highlights for each of the five
years in the period then ended, in conformity with accounting principles
generally accepted in the United States of America.

Deloitte & Touche LLP
Princeton, New Jersey
May 27, 2008


           WCMA GOVERNMENT SECURITIES FUND           MARCH 31, 2008           21


Officers and Directors



                                                                                               Number of
                       Position(s)   Length of                                                 BlackRock-
                       Held with     Time Served                                               Advised Funds
Name, Address          Fund/         as a         Principal Occupation(s)                      and Portfolios  Public
and Year of Birth      Master LLC    Director**   During Past Five Years                       Overseen        Directorships
                                                                                                
====================================================================================================================================
Non-Interested Directors*
- ------------------------------------------------------------------------------------------------------------------------------------
David O. Beim          Director      Since 2007   Professor of Finance and Economics at the    35 Funds        None
40 East 52nd Street                               Columbia University Graduate School of       81 Portfolios
New York, NY 10022                                Business since 1991; Trustee, Phillips
1940                                              Exeter Academy since 2002; Formerly
                                                  Chairman, Wave Hill, Inc. (public garden
                                                  and cultural center) from 1990 to 2006.
- ------------------------------------------------------------------------------------------------------------------------------------
Ronald W. Forbes       Director and  Since 2002   Professor Emeritus of Finance, School of     35 Funds        None
40 East 52nd Street    Co-Chair                   Business, State University of New York at    81 Portfolios
New York, NY 10022     of the Board               Albany since 2000.
1940                   of Directors
- ------------------------------------------------------------------------------------------------------------------------------------
Dr. Matina Horner      Director      Since 2007   Formerly Executive Vice President of         35 Funds        NSTAR (electric
40 East 52nd Street                               Teachers Insurance and Annuity Association   81 Portfolios   and gas utility)
New York, NY 10022                                and College Retirement Equities Fund from
1939                                              1989 to 2003.
- ------------------------------------------------------------------------------------------------------------------------------------
Rodney D. Johnson      Director and  Since 2007   President, Fairmount Capital Advisors, Inc.  35 Funds        None
40 East 52nd Street    Co-Chair                   since 1987; Director, Fox Chase Cancer       81 Portfolios
New York, NY 10022     of the Board               Center since 2002; Member of the
1941                   of Directors               Archdiocesan Investment Committee of the
                                                  Archdiocese of Philadelphia since 2003;
                                                  Director, the Committee of Seventy (civic)
                                                  since 2006.
- ------------------------------------------------------------------------------------------------------------------------------------
Herbert I. London      Director and  Since 2007   Professor Emeritus, New York University      35 Funds        AIMS Worldwide, Inc.
40 East 52nd Street    Member of                  since 2005; John M. Olin Professor of        81 Portfolios   (marketing)
New York, NY 10022     the Audit                  Humanities, New York University from 1993
1939                   Committee                  to 2005 and Professor thereof from 1980 to
                                                  2005; President, Hudson Institute (policy
                                                  research organization) since 1997 and
                                                  Trustee thereof since 1980; Chairman of the
                                                  Board of Trustees for Grantham University
                                                  since 2006; Director of InnoCentive, Inc.
                                                  (strategic solutions company) since 2005;
                                                  Director of Cerego, LLC (software
                                                  development and design) since 2005.
- ------------------------------------------------------------------------------------------------------------------------------------
Cynthia A. Montgomery  Director      Since 2002   Professor, Harvard Business School since     35 Funds        Newell Rubbermaid,
40 East 52nd Street                               1989; Director, Harvard Business School      81 Portfolios   Inc. (manufacturing)
New York, NY 10022                                Publishing since 2005; Director, McLean
1952                                              Hospital since 2005.
- ------------------------------------------------------------------------------------------------------------------------------------
Joseph P. Platt, Jr.   Director      Since 2007   Director, The West Penn Allegheny Health     35 Funds        Greenlight Capital
40 East 52nd Street                               System (a not-for-profit health system)      81 Portfolios   Re, Ltd. (reinsurance
New York, NY 10022                                since 2008; Partner, Amarna Corporation,                     company)
1947                                              LLC (private investment company) since
                                                  2002; Director, WQED Multimedia (PBS and
                                                  Multimedia, a not-for-profit company)
                                                  since 2002; Director, Jones and Brown
                                                  (Canadian insurance broker) since 1998;
                                                  General Partner, Thorn Partner, LP (private
                                                  investment) since 1998.
- ------------------------------------------------------------------------------------------------------------------------------------
Robert C. Robb, Jr.    Director      Since 2007   Partner, Lewis, Eckert, Robb and Company     35 Funds        None
40 East 52nd Street                               (management and financial consulting firm)   81 Portfolios
New York, NY 10022                                since 1981.
1945
- ------------------------------------------------------------------------------------------------------------------------------------



22           WCMA GOVERNMENT SECURITIES FUND           MARCH 31, 2008


Officers and Directors (continued)



                                                                                               Number of
                       Position(s)   Length of                                                 BlackRock-
                       Held with     Time Served                                               Advised Funds
Name, Address          Fund/         as a         Principal Occupation(s)                      and Portfolios  Public
and Year of Birth      Master LLC    Director**   During Past Five Years                       Overseen        Directorships
                                                                                                
====================================================================================================================================
Non-Interested Directors* (concluded)
- ------------------------------------------------------------------------------------------------------------------------------------
Toby Rosenblatt        Director      Since 2007   President, Founders Investments Ltd.         35 Funds        A.P. Pharma, Inc.
40 East 52nd Street                               (private investments) since 1999; Director   81 Portfolios   (speciality
New York, NY 10022                                of Forward Management, LLC since 2007;                       pharmaceuticals)
1938                                              Director, The James Irvine Foundation
                                                  (philanthropic foundation) since 1997;
                                                  Formerly Trustee, State Street Research
                                                  Mutual Funds from 1990 to 2005; Formerly,
                                                  Trustee, Metropolitan Series Funds, Inc.
                                                  from 2001 to 2005.
- ------------------------------------------------------------------------------------------------------------------------------------
Kenneth L. Urish       Director and  Since 2007   Managing Partner, Urish Popeck & Co., LLC    35 Funds        None
40 East 52nd Street    Chair of                   (certified public accountants and            81 Portfolios
New York, NY 10022     the Audit                  consultants) since 1976; Member of External
1951                   Committee                  Advisory Board, The Pennsylvania State
                                                  University Accounting Department since
                                                  2001; Trustee, The Holy Family Foundation
                                                  since 2001; Committee Member/Professional
                                                  Ethics Committee of the Pennsylvania
                                                  Institute of Certified Public Accountants
                                                  since 2007; President and Trustee,
                                                  Pittsburgh Catholic Publishing Associates
                                                  since 2003; Formerly Director, Inter-Tel
                                                  from 2006 to 2007.
- ------------------------------------------------------------------------------------------------------------------------------------
Frederick W. Winter    Director and  Since 2007   Professor and Dean Emeritus of the Joseph    35 Funds        None
40 East 52nd Street    Member of                  M. Katz School of Business, University of    81 Portfolios
New York, NY 10022     the Audit                  Pittsburgh since 2005 and Dean thereof from
1945                   Committee                  1997 to 2005. Director, Alkon Corporation
                                                  (pneumatics) since 1992; Director,
                                                  Indotronix International (IT services)
                                                  since 2004; Director, Tippman Sports
                                                  (recreation) since 2005.
                       -------------------------------------------------------------------------------------------------------------
                       *     Directors serve until their resignation, removal or death, or until December 31 of the year in which
                             they turn 72.
                       **    Following the combination of Merrill Lynch Investment Managers, L.P. ("MLIM") and BlackRock, Inc.
                             ("BlackRock") in September 2006, the various legacy MLIM and legacy BlackRock Fund boards were
                             realigned and consolidated into three new Fund boards in 2007. As a result, although the chart shows
                             certain directors as joining the Fund's/Master LLC's board in 2007, those directors first became a
                             member of the board of directors of other legacy MLIM or legacy BlackRock Funds as follows: David O.
                             Beim since 1998; Ronald W. Forbes since 1977; Matina Horner since 2004; Rodney D. Johnson since 1995;
                             Herbert I. London since 1987; Cynthia A. Montgomery since 1994; Joseph P. Platt since 1999; Robert C.
                             Robb, Jr. since 1999; Toby Rosenblatt since 2005; Kenneth L. Urish since 1999 and Frederick W. Winter
                             since 1999.

====================================================================================================================================
Interested Directors*
- ------------------------------------------------------------------------------------------------------------------------------------
Richard S. Davis       Director      Since 2007   Managing Director, BlackRock, Inc. since     185 Funds       None
40 East 52nd Street                               2005; Formerly Chief Executive Officer,      292 Portfolios
New York, NY 10022                                State Street Research & Management Company
1945                                              from 2000 to 2005; Formerly Chairman of the
                                                  Board of Trustees, State Street Research
                                                  Mutual Funds from 2000 to 2005; Formerly
                                                  Chairman, SSR Realty from 2000 to 2004.
- ------------------------------------------------------------------------------------------------------------------------------------
Henry Gabbay           Director      Since 2007   Consultant, BlackRock, Inc. since 2007;      184 Funds       None
40 East 52nd Street                               Formerly Managing Director, BlackRock, Inc.  291 Portfolios
New York, NY 10022                                from 1989 to 2007; Formerly Chief
1947                                              Administrative Officer, BlackRock Advisors,
                                                  LLC from 1998 to 2007; Formerly President
                                                  of BlackRock Funds and BlackRock Bond
                                                  Allocation Target Shares from 2005 to 2007
                                                  and Treasurer of certain closed-end funds
                                                  in the BlackRock fund complex from 1989 to
                                                  2006.
                       -------------------------------------------------------------------------------------------------------------
                       *     Messrs. Davis and Gabbay are both "interested persons," as defined in the Investment Company Act of
                             1940, of the Fund/Master LLC based on their positions with BlackRock, Inc. and its affiliates.
                             Directors serve until their resignation, removal or death, or until December 31 of the year in which
                             they turn 72.
- ------------------------------------------------------------------------------------------------------------------------------------



           WCMA GOVERNMENT SECURITIES FUND           MARCH 31, 2008           23


Officers and Directors (concluded)



                       Position(s)
                       Held with
Name, Address          Fund/         Length of
and Year of Birth      Master LLC    Time Served  Principal Occupation(s) During Past Five Years
                                         
====================================================================================================================================
Fund/Master LLC's Officers*
- ------------------------------------------------------------------------------------------------------------------------------------
Donald C. Burke        Fund          Since 2007   Managing Director of BlackRock, Inc. since 2006; Formerly Managing Director of
40 East 52nd Street    President                  Merrill Lynch Investment Managers, L.P. ("MLIM") and Fund Asset Management, L.P.
New York, NY 10022     and Chief                  ("FAM") in 2006; First Vice President thereof from 1997 to 2005; Treasurer thereof
1960                   Executive                  from 1999 to 2006 and Vice President thereof from 1990 to 1997.
                       Officer
- ------------------------------------------------------------------------------------------------------------------------------------
Anne F. Ackerley       Vice          Since 2007   Managing Director of BlackRock, Inc. since 2000 and First Vice President and Chief
40 East 52nd Street    President                  Operating Officer of Mergers and Acquisitions Group from 1997 to 2000; First Vice
New York, NY 10022                                President and Chief Operating Officer of Public Finance Group thereof from 1995 to
1962                                              1997; First Vice President of Emerging Markets Fixed Income Research of Merrill
                                                  Lynch & Co., Inc. from 1994 to 1995.
- ------------------------------------------------------------------------------------------------------------------------------------
Neal J. Andrews        Chief         Since 2007   Managing Director of BlackRock, Inc. since 2006; Formerly Senior Vice President
40 East 52nd Street    Financial                  and Line of Business Head of Fund Accounting and Administration at PFPC Inc. from
New York, NY 10022     Officer                    1992 to 2006.
1966
- ------------------------------------------------------------------------------------------------------------------------------------
Jay M. Fife            Treasurer     Since 2007   Managing Director of BlackRock, Inc. since 2007 and Director in 2006; Formerly
40 East 52nd Street                               Assistant Treasurer of the MLIM/FAM advised funds from 2005 to 2006; Director of
New York, NY 10022                                MLIM Fund Services Group from 2001 to 2006.
1970
- ------------------------------------------------------------------------------------------------------------------------------------
Brian P. Kindelan      Chief         Since 2007   Chief Compliance Officer of the Funds since 2007; Anti-Money Laundering Officer of
40 East 52nd Street    Compliance                 the Funds since 2007; Managing Director and Senior Counsel thereof since 2005;
New York, NY 10022     Officer of                 Director and Senior Counsel of BlackRock Advisors, Inc. from 2001 to 2004 and Vice
1959                   the Funds                  President and Senior Counsel thereof from 1998 to 2000; Senior Counsel of The PNC
                                                  Bank Corp. from 1995 to 1998.
- ------------------------------------------------------------------------------------------------------------------------------------
Howard Surloff         Secretary     Since 2007   Managing Director of BlackRock, Inc. and General Counsel of U.S. Funds at
40 East 52nd Street                               BlackRock, Inc. since 2006; Formerly General Counsel (U.S.) of Goldman Sachs Asset
New York, NY 10022                                Management, L.P. from 1993 to 2006.
1965
                       -------------------------------------------------------------------------------------------------------------
                       *     Officers of the Fund/Master LLC serve at the pleasure of the Board of Directors.
- ------------------------------------------------------------------------------------------------------------------------------------
                       Further information about the Fund's/Master LLC's Officers and Directors is available in the Fund's/Master
                       LLC's Statement of Additional Information, which can be obtained without charge by calling (800) 441-7762.
- ------------------------------------------------------------------------------------------------------------------------------------


Custodian

State Street Bank and
Trust Company
Boston, MA 02101

Transfer Agent

Financial Data Services, Inc.
Jacksonville, FL 32246

Accounting Agent

State Street Bank and
Trust Company
Princeton, NJ 08540

Independent Registered Public Accounting Firm

Deloitte & Touche LLP
Princeton, NJ 08540

Legal Counsel

Sidley Austin LLP
New York, NY 10019


24           WCMA GOVERNMENT SECURITIES FUND           MARCH 31, 2008


Additional Information

Availability of Quarterly Schedule of Investments

The Fund files its complete schedule of portfolio holdings with the Securities
and Exchange Commission ("SEC") for the first and third quarters of each fiscal
year on Form N-Q. The Fund's Forms N-Q are available on the SEC's website at
http://www.sec.gov and may also be reviewed and copied at the SEC's Public
Reference Room in Washington, DC. Information on the operation of the Public
Reference Room may be obtained by calling (800) SEC-0330. The Fund's Forms N-Q
may also be obtained upon request and without charge by calling (800) 441-7762.

Electronic Delivery

Electronic copies of most financial reports and prospectuses are available on
the Fund's website or shareholders can sign up for e-mail notifications of
quarterly statements, annual and semi-annual reports and prospectuses by
enrolling in the Fund's electronic delivery program.

Shareholders Who Hold Accounts with Investment Advisors, Banks or Brokerages:

Please contact your financial advisor to enroll. Please note that not all
investment advisors, banks or brokerages may offer this service.

General Information

The Fund will mail only one copy of shareholder documents, including annual and
semi-annual reports and proxy statements, to shareholders with multiple accounts
at the same address. This practice is commonly called "householding" and it is
intended to reduce expenses and eliminate duplicate mailings of shareholder
documents. Mailings of your shareholder documents may be householded
indefinitely unless you instruct us otherwise. If you do not want the mailing of
these documents to be combined with those for other members of your household,
please contact the fund at (800) 441-7762.


           WCMA GOVERNMENT SECURITIES FUND           MARCH 31, 2008           25


Additional Information (concluded)

BlackRock Privacy Principles

BlackRock is committed to maintaining the privacy of its current and former fund
investors and individual clients (collectively, "Clients") and to safeguarding
their non-public personal information. The following information is provided to
help you understand what personal information BlackRock collects, how we protect
that information and why in certain cases we share such information with select
parties.

If you are located in a jurisdiction where specific laws, rules or regulations
require BlackRock to provide you with additional or different privacy-related
rights beyond what is set forth below, then BlackRock will comply with those
specific laws, rules or regulations.

BlackRock obtains or verifies personal non-public information from and about you
from different sources, including the following: (i) information we receive from
you or, if applicable, your financial intermediary, on applications, forms or
other documents; (ii) information about your transactions with us, our
affiliates, or others; (iii) information we receive from a consumer reporting
agency; and (iv) from visits to our websites.

BlackRock does not sell or disclose to non-affiliated third parties any
non-public personal information about its Clients, except as permitted by law or
as is necessary to respond to regulatory requests or to service Client accounts.
These non-affiliated third parties are required to protect the confidentiality
and security of this information and to use it only for its intended purpose.

We may share information with our affiliates to service your account or to
provide you with information about other BlackRock products or services that may
be of interest to you. In addition, BlackRock restricts access to non-public
personal information about its Clients to those BlackRock employees with a
legitimate business need for the information. BlackRock maintains physical,
electronic and procedural safeguards that are designed to protect the non-public
personal information of its Clients, including procedures relating to the proper
storage and disposal of such information.


26           WCMA GOVERNMENT SECURITIES FUND           MARCH 31, 2008


This report is transmitted to shareholders only. It is not authorized for use as
an offer of sale or a solicitation of an offer to buy shares of the Fund unless
accompanied or preceded by the Fund's current prospectus. An investment in the
Fund is not insured or guaranteed by the Federal Deposit Insurance Corporation
or any other government agency. Although the Fund seeks to preserve the value of
your investment at $1.00 per share, it is possible to lose money by investing in
the Fund. Total return information assumes reinvestment of all distributions.
Past performance results shown in this report should not be considered a
representation of future performance. For current month-end performance
information, call (800) 882-0052. The Fund's current 7-day yield more closely
reflects the current earnings of the Fund than the total returns quoted.
Statements and other information herein are as dated and are subject to change.

A description of the policies and procedures that the Fund uses to determine how
to vote proxies relating to portfolio securities is available (1) without
charge, upon request, by calling toll-free (800) 441-7762; (2) at
www.blackrock.com; and (3) on the Securities and Exchange Commission's website
at http://www.sec.gov. Information about how the Fund voted proxies relating to
securities held in the Fund's portfolio during the most recent 12-month period
ended June 30 is available (1) at www.blackrock.com or by calling (800) 441-7762
and (2) on the Securities and Exchange Commission's website at
http://www.sec.gov.

WCMA Government Securities Fund
100 Bellevue Parkway
Wilmington, DE 19809

                                                                 #WCMAGS -- 3/08



Item 2 -    Code of Ethics - The registrant (or the "Fund") has adopted a code
            of ethics, as of the end of the period covered by this report,
            applicable to the registrant's principal executive officer,
            principal financial officer and principal accounting officer, or
            persons performing similar functions. During the period covered by
            this report, there have been no amendments to or waivers granted
            under the code of ethics. A copy of the code of ethics is available
            without charge at www.blackrock.com.

Item 3 -    Audit Committee Financial Expert - The registrant's board of
            directors or trustees, as applicable (the "board of directors") has
            determined that (i) the registrant has the following audit committee
            financial experts serving on its audit committee and (ii) each audit
            committee financial expert is independent:
            Ronald W. Forbes (not reappointed to audit committee, effective
            November 1, 2007)
            Kenneth L. Urish (term began, effective November 1, 2007)
            Richard R. West (term ended, effective November 1, 2007)

            Under applicable securities laws, a person determined to be an audit
            committee financial expert will not be deemed an "expert" for any
            purpose, including without limitation for the purposes of Section 11
            of the Securities Act of 1933, as a result of being designated or
            identified as an audit committee financial expert. The designation
            or identification as an audit committee financial expert does not
            impose on such person any duties, obligations, or liabilities
            greater than the duties, obligations, and liabilities imposed on
            such person as a member of the audit committee and board of
            directors in the absence of such designation or identification.

Item 4 -    Principal Accountant Fees and Services



- ----------------------------------------------------------------------------------------------------------------------------------
                         (a) Audit Fees          (b) Audit-Related Fees(1)        (c) Tax Fees(2)            (d) All Other Fees(3)
- ----------------------------------------------------------------------------------------------------------------------------------
                      Current      Previous        Current      Previous        Current      Previous        Current      Previous
                    Fiscal Year     Fiscal       Fiscal Year     Fiscal       Fiscal Year     Fiscal       Fiscal Year     Fiscal
   Entity Name          End        Year End          End        Year End          End        Year End          End        Year End
- ----------------------------------------------------------------------------------------------------------------------------------
                                                                                                     
Master Government
Securities LLC        $24,300      $28,500           $0            $0           $9,200        $9,200          $0             $0
- ----------------------------------------------------------------------------------------------------------------------------------
WCMA Government
Securities Fund       $6,800       $6,600            $0            $0           $6,100        $6,100          $749           $0
- ----------------------------------------------------------------------------------------------------------------------------------


1 The nature of the services include assurance and related services reasonably
related to the performance of the audit of financial statements not included in
Audit Fees.
2 The nature of the services include tax compliance, tax advice and tax
planning.
3 The nature of the services include a review of compliance procedures and
attestation thereto.

            (e)(1) Audit Committee Pre-Approval Policies and Procedures:

                  The registrant's audit committee (the "Committee") has adopted
            policies and procedures with regard to the pre-approval of services.
            Audit, audit-related and tax compliance services provided to the
            registrant on an annual basis require specific pre-approval by the
            Committee. The Committee also must approve other non-audit services
            provided to the registrant and those non-audit services provided to
            the registrant's affiliated service providers that relate directly
            to the operations and the financial reporting of the registrant.
            Certain of these non-audit services that the Committee believes are
            a) consistent with the SEC's auditor independence rules and b)
            routine and recurring services that will not impair the independence
            of the independent accountants may be approved by the Committee
            without consideration on a specific case-by-case basis ("general
            pre-approval"). The term of any general pre-approval is 12 months
            from the date of the pre-approval, unless the Committee provides for
            a different period. Tax or other non-audit services provided to the



            registrant which have a direct impact on the operation or financial
            reporting of the registrant will only be deemed pre-approved
            provided that any individual project does not exceed $10,000
            attributable to the registrant or $50,000 for all of the registrants
            the Committee oversees. For this purpose, multiple projects will be
            aggregated to determine if they exceed the previously mentioned cost
            levels.

                  Any proposed services exceeding the pre-approved cost levels
            will require specific pre-approval by the Committee, as will any
            other services not subject to general pre-approval (e.g.,
            unanticipated but permissible services). The Committee is informed
            of each service approved subject to general pre-approval at the next
            regularly scheduled in-person board meeting. At this meeting, an
            analysis of such services is presented to the Committee for
            ratification. The Committee may delegate to one or more of its
            members the authority to approve the provision of and fees for any
            specific engagement of permitted non-audit services, including
            services exceeding pre-approved cost levels.

            (e)(2) None of the services described in each of Items 4(b) through
            (d) were approved by the audit committee pursuant to paragraph
            (c)(7)(i)(C) of Rule 2-01 of Regulation S-X.

            (f) Not Applicable

            (g) Affiliates' Aggregate Non-Audit Fees:

            --------------------------------------------------------------------
                                               Current Fiscal    Previous Fiscal
            Entity Name                           Year End           Year End
            --------------------------------------------------------------------
            Master Government Securities LLC      $287,500          $3,023,700
            --------------------------------------------------------------------
            WCMA Government Securities Fund       $288,549          $3,020,600
            --------------------------------------------------------------------

            (h) The registrant's audit committee has considered and determined
            that the provision of non-audit services that were rendered to the
            registrant's investment adviser (not including any non-affiliated
            sub-adviser whose role is primarily portfolio management and is
            subcontracted with or overseen by the registrant's investment
            adviser), and any entity controlling, controlled by, or under common
            control with the investment adviser that provides ongoing services
            to the registrant that were not pre-approved pursuant to paragraph
            (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with
            maintaining the principal accountant's independence.

            Regulation S-X Rule 2-01(c)(7)(ii) - $287,500, 0%

Item 5 -    Audit Committee of Listed Registrants - Not Applicable

Item 6 -    Investments
            (a) The registrant's Schedule of Investments is included as part of
            the Report to Stockholders filed under Item 1 of this form.
            (b) Not Applicable due to no such divestments during the semi-annual
            period covered since the previous Form N-CSR filing.

Item 7 -    Disclosure of Proxy Voting Policies and Procedures for Closed-End
            Management Investment Companies - Not Applicable



Item 8 -    Portfolio Managers of Closed-End Management Investment Companies -
            Not Applicable

Item 9 -    Purchases of Equity Securities by Closed-End Management Investment
            Company and Affiliated Purchasers - Not Applicable

Item 10 -   Submission of Matters to a Vote of Security Holders - The
            registrant's Nominating and Governance Committee will consider
            nominees to the Board recommended by shareholders when a vacancy
            becomes available. Shareholders who wish to recommend a nominee
            should send nominations which include biographical information and
            set forth the qualifications of the proposed nominee to the
            registrant's Secretary. There have been no material changes to these
            procedures.

Item 11 -   Controls and Procedures

11(a) -     The registrant's principal executive and principal financial
            officers or persons performing similar functions have concluded that
            the registrant's disclosure controls and procedures (as defined in
            Rule 30a-3(c) under the Investment Company Act of 1940, as amended
            (the "1940 Act")) are effective as of a date within 90 days of the
            filing of this report based on the evaluation of these controls and
            procedures required by Rule 30a-3(b) under the 1940 Act and Rule
            15d-15(b) under the Securities Exchange Act of 1934, as amended.

11(b) -     There were no changes in the registrant's internal control over
            financial reporting (as defined in Rule 30a-3(d) under the 1940 Act)
            that occurred during the second fiscal quarter of the period covered
            by this report that have materially affected, or are reasonably
            likely to materially affect, the registrant's internal control over
            financial reporting.

Item 12 -   Exhibits attached hereto

12(a)(1) -  Code of Ethics - See Item 2

12(a)(2) -  Certifications - Attached hereto

12(a)(3) -  Not Applicable

12(b) -     Certifications - Attached hereto



Pursuant to the requirements of the Securities Exchange Act of 1934 and the
Investment Company Act of 1940, the registrant has duly caused this report to be
signed on its behalf by the undersigned, thereunto duly authorized.

WCMA Government Securities Fund and Master Government Securities LLC


By: /s/ Donald C. Burke
    -----------------------------------
    Donald C. Burke
    Chief Executive Officer of
    WCMA Government Securities Fund and Master Government Securities LLC

Date: May 22, 2008

Pursuant to the requirements of the Securities Exchange Act of 1934 and the
Investment Company Act of 1940, this report has been signed below by the
following persons on behalf of the registrant and in the capacities and on the
dates indicated.


By: /s/ Donald C. Burke
    -----------------------------------
    Donald C. Burke
    Chief Executive Officer (principal executive officer) of
    WCMA Government Securities Fund and Master Government Securities LLC

Date: May 22, 2008


By: /s/ Neal J. Andrews
    -----------------------------------
    Neal J. Andrews
    Chief Financial Officer (principal financial officer) of
    WCMA Government Securities Fund and Master Government Securities LLC

Date: May 22, 2008