Question

【题目】2018年上海崇明二模They______the big fire before I returned with some people to help.

A. are putting out B. put out C. had put out D. would put out

Answer 1

【答案】C

【解析】句意：在我和一些人回来帮忙之前，他们已经扑灭了大火。put out扑灭，putting现在分词； put过去式或过去分词。A. are putting out现在进行时态；B. put out原形或过去式；C. had put out过去完成时态；D. would put out过去将来时态。根据句意可知，“扑灭大火”是在returned之前发生的事情，也就是发生在“过去的过去”，所以使用过去完成时态：had+过去分词。故选：C。