题目内容

【题目】She must have finished her homework yesterday, ?

A. mustn`t she B. hasn`t she

C. didn`t she D. doesn`t she

【答案】C

【解析】

试题分析：句意：昨天她一定完成了家庭作业，不是吗？当句子使用“情态动词+have done”表示对过去情况的推测时，如果句中有过去时时间状语，就对过去时反问；如果没有过去时时间状语，就对现在完成时反问。本句中含有yesterday，并且句中是行为动词finish，所以使用助动词did进行反问。故C正确。

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