One of the most important non-legislative functions of the U.S Congress is the power to investigate. The power is usually delegated to committees—either standing committees, special committees set for a specific purpose, or joint committees __1__ consisted of members of both houses. Investigations __2__ are held to gather information on the need for future legislation,to test the effectiveness of laws already passed,to inquire into the qualifications and performance of members and officials of the other branches, and in rare occasions, __3__ to lay the groundwork for impeachment proceedings. Frequently,committees rely outside experts to assist in conducting __4__ investigative hearings and to make out detailed studies of issues. __5__
    There are important corollaries to the investigative power. One is the power to publicize investigations and its results. Most __6__ committee hearings are open to public and are reported widely __7__ in the mass media. Congressional investigations nevertheless __8__ represent one important tool available to lawmakers to inform the citizenry and to arouse public interests in national issues, __9__ Congressional committees also have the power to compel testimony from unwilling witnesses, and to cite for contempt of Congress witnesses who refuse to testify and for perjury these who give false testimony. __10__ 　　
    答案：　　
    1 在set和for中間加上up。短語set up表示“設(shè)立”，這里用作過去分詞，修飾前面的committees。
    2 consisted改為 consisting。joint committee 是consist of 的邏輯主語，所以要用現(xiàn)在分詞。
    3 in改為on 。與occasion搭配的介詞應(yīng)該為on。
    4 rely和outside中間加上on。rely 后面要用介詞on。
    5 out去掉。make studies 表示“進行研究”，這里沒有必要用out。
    6 its 改為 their。這里代詞指代的是復(fù)數(shù)名詞investigations，所以也要用復(fù)數(shù)形式。
    7 to 和public中間加上the。表示“大眾，公眾”時，前面要加定冠詞。
    8 nevertheless 改為thus ,therefore。作者前面說國會有向社會公開調(diào)查信息的權(quán)利，本句說調(diào)查是立法者向公眾傳達消息的工具，這兩句話之間應(yīng)該是因果關(guān)系，而不是轉(zhuǎn)折關(guān)系。
    9 interests改為interest 。作者此處要表達的是“激起公眾的興趣：，應(yīng)該用”interest。interests一般表示“利益”。
    10 these改為those。用代詞指代一群人，后面在加定語從句修飾時，代詞一般要用those。