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：
句意：两天前搜救队肯定已经寻找过失踪的游客了，对吗？此题考查含情态动词的句子的反意疑问句。must have done表示对过去的肯定推测，表示“肯定已经……”，反问用一般过去时的否定形式，故选C。

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