Which of the following sentences expresses "probability"?

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问题 Which of the following sentences expresses "probability"?

选项 A、You must have your hair cut by ten o’clock.
B、You must be in the office tomorrow.
C、You must complete the work tonight.
D、You must be feeling better now.

答案D

解析 考查情态动词must的用法。must除了表示“必须”之义外,还可以表示“推测/猜测”之义,如:You have worked hard all day.You must be tired now.(表示对现在的推测)I didn’t hearthe phone.I must have been asleep.(表示对过去的推测)。A、B、C均表示一种命令,只有D“你现在应该感觉好多了吧”表示推测,故为正确答案。
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