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

单选题
2022-01-14 00:41
A、mustn’t they
B、haven’t they
C、didn’t they
D、hadn’t they
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正确答案
C

试题解析

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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