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It’s rather cold in the room. They______ have turned off the steam a few hours a
It’s rather cold in the room. They______ have turned off the steam a few hours a
游客
2023-10-11
26
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问题
It’s rather cold in the room. They______ have turned off the steam a few hours ago.
选项
A、should
B、must
C、ought to
D、could
答案
B
解析
句意:屋子里相当冷,他们一定在几小时前关闭了暖气。考查must have done结构。这种结构表示对过去事情肯定性很强的推断。意思是“肯定,一定”。
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