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外语
Which of the following sentences expresses "probability"?
Which of the following sentences expresses "probability"?
admin
2013-10-18
65
问题
Which of the following sentences expresses "probability"?
选项
A、He must have picked up a cold—he’s begun to snuffle.
B、We must have a clear understanding of the problem.
C、One must have one’s own opinions and not drift with the current.
D、To be healthy one must have an adequate diet.
答案
A
解析
情态动词题。情态动词must除了用来表示命令,必须如何以外,还可表示有依据的肯定推测,意为“一定会……”,对现在情况的推测用“must+动词原形”;对已经发生的情况的推测则用“must have done”。[B]、[C]、[D]中的must have都表示“必须要有……”;[A]意为:他开始鼻塞,一定是感冒了。因此,[A]为答案。
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专业英语四级
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