The rescue team must have searched for the missing visitors in the earthquake tw

游客2024-07-03 46

问题 The rescue team must have searched for the missing visitors in the earthquake two days ago, ______?

选项 A、mustn’t they
B、haven’t they
C、didn’t they
D、hadn’t they

答案 C

解析本题考查反义疑问句。如果陈述部分含有表推测的情态动词must，其反问部分应根据具体情况而定。must表示推测，其简短疑问句部分必须与must后面的主要动词相呼应。对过去发生的动作或存在的情况推测时，若表示肯定，则用haven’t或hasn’t；但如果句中有表示过去的时间状语，如yesterday，two days ago等时，则用didn’t；若表示否定，其否定式通常不是must not，而是can’t(cannot)。本题中是对过去的肯定推测，有一个表示过去的时间状语two days ago，因此应当用didn’t they。

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