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In order to find the missing child, villagers _______ all they can over the past five hours.

A.didB.doC.had doneD.have been doing

D

解析试题分析:句意:在过去的5小时里,村民们为了找到丢失的孩子,一直做他们所能做的一切。over /during/in+the past /last+时间短语,经常与现在完成时连用。故选D。
考点:考查时态的用法。

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