2. 外语
  3. Which of the following sentences expresses "probability"?

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 leave immediately.
B、You must be feeling rather tired.
C、You must be here by eight o’clock.
D、You must complete the reading assignment on time.
答案B
解析 情态动词题。must作为情态动词，一用来表示命令，必须如何；二表示肯定推测，可能会怎样。[A]意为“你必须马上离开”；[C]意为“你必须8点前到这儿”；[D]意为“你必须按时完成阅读作业”，这三二句中must都是第一种用法。[B]意为“你一定感到很累了”，这是第二种用法，肯定的判断，表示可能性，故为正确答案。
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