单选题The rescue team must have searched for the missing visitors two days ago, _____?Amustn’t theyBhaven’t theyCdidn’t theyDhadn’t they

单选题
The rescue team must have searched for the missing visitors two days ago, _____?
A

mustn’t they

B

haven’t they

C

didn’t they

D

hadn’t they


参考解析

解析:
当陈述部分出现must have done时,若强调对过去情况的推测(一般有过去时间状语),反意疑问部分的谓语动词用didn’t+主语;若前句强调动作的完成,疑问部分谓语动词用haven’t/ hasn’t+主语。本句有明显的时间状语two days ago,故选C。

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