2. 外语
  3. They must have stayed at hotel last night, ______?

They must have stayed at hotel last night, ______?

admin2012-05-07  25
问题 They must have stayed at hotel last night, ______?
选项 A、mustn’t they
B、haven’t they
C、didn’t they
D、hadn’t they
答案C
解析 反意疑问句题。must have stayed表示对过去的猜测，因此反意疑问句部分，用助动词did。因此答案为C。
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