[题目](2012·安徽) In order to find the missing child, villagers all they can over the past five hours.A. did B. doC. had done D. have been doing 题目和参考答案——青夏教育精英家教网—

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【题目】(2012·安徽) 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 been doing

【答案】D

【解析】本题考查现在完成进行时。根据后面的时间状语over the past five hours可知用现在完成进行时，所以选择D。句意：为了找到失踪儿童，村民们在过去的5小时里竭尽所能。

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