We all know some of the police’s duties are to keep order and ________ the law.

A. give out B. find out C. come out D. carry out

D 【解析】句意“我們都知道,一些警察的作用是維持秩序并執(zhí)法”。A.發(fā)出;分發(fā);B.查明;C.出版;D.執(zhí)行。carry out the law執(zhí)法。根據(jù)句意,故選D。
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