So far no life has been found outside the earth, but while some scientists are a - 高中英语试题 - 超级试练试题库

题目

题型：不详难度：来源：

So far no life has been found outside the earth, but while some scientists are actively searching for living things in outer space, others firmly believe there ______.

A. mustn’t be

B. may not be

C. can’t be

D. won’t be

答案

解析

这题考查情态动词的用法：can’t be“不可能”句意是：到目前为止没有发现生命在地球上，但有些科学家正在积极寻找生物在外层空间，别人相信不可能有。选C

核心考点

试题【So far no life has been found outside the earth, but while some scientists are a】；主要考察你对虚拟语气等知识点的理解。[详细]

举一反三

He commanded that all the gates ．

A．should shut

B．would be shut

C．shut

D．be shut

题型：不详难度：| 查看答案

Determined to devote himself to those poor children, he chose to teach in a western province, though he _______ in the city for a better life．
A could stay B would have stayed C could have stayed D had stayed

题型：不详难度：| 查看答案

But for the heavy traffic, the police ___ the thieves who tried to escape in the stolen car.

A．would not catch

B．couldn’t have caught

C．haven’t caught

D．couldn’t catch

题型：不详难度：| 查看答案

Generally speaking, my grandmother is nice and kind, but she _______ be very
stubborn at times.

A．should

B．shall

C．must

D．can

题型：不详难度：| 查看答案

— Mum, would you please buy me an MP5 player?
— If you can help do some housework the whole vacation, you ____ have one as a reward.

A．must

B．need

C．would

D．shall

题型：不详难度：| 查看答案

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