【題目】In order to find the missing child, villagers _________ all they can over the past five hours.

A. did B. do

C. had done D. have done

【答案】D

【解析】

考查時態(tài)。

句意：為了找到那個失蹤的孩子，在過去的5個小時中，村民們已經(jīng)做了所有他們能做的。句中they can是定語從句，修飾先行詞all，在從句中省略了can后面的do（因為主句謂語動詞是實意動詞do），根據(jù)句中時間狀語over the past five hours可知用現(xiàn)在完成時。故選D。

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