Which of the following sentences expresses probability？A．He must have picked up a cold—he"

外语类 2017-08-19 00:24:21 已帮助人

Which of the following sentences expresses probability？

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.

请帮忙给出正确答案和分析，谢谢！

难度★★☆ 搜索

正确答案：A
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“musthavedone”。[B]、[C]以及[D]中的musthave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。

Which of the following sentences expresses probability？A．He must have picked up a cold—he&quot;