题目内容
【题目】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 been doing
【答案】D
【解析】句意:为了找到走失的孩子,在过去的五个小时,村民们已竭尽了全力。根据over the past five hours 可知用现在完成进行时。
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