Jack _____ yet, otherwise he would have telephoned me.A．mustn’t have arrivedB．sh

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Jack _____ yet, otherwise he would have telephoned me.

A．mustn’t have arrived	B．shouldn’t have arrived
C．can’t have arrived	D．needn’t have arrived

答案

解析

根据第二分句“否则的话他就会给我打电话了”可知“Jack肯定还没到”，“can’t+完成式”意思是“根本不可能”。

举一反三

Sir, you ______be sitting in this waiting room. It is for women and children only.

A．mustn’t

B．can’t

C．won’t

D．needn’t

题型：不详难度：| 查看答案

A left-luggage office is a place where bags _______ be left for a short time, especially at a railway station.

A．should

B．can

C．must

D．will

题型：不详难度：| 查看答案

He ____ writing the paper now. He hadn’t written a single word when I left him ten minutes ago.

A．shouldn’t be

B．can’t have finished

C．can’t be

D．mustn’t have finished

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——Are you content with her lecture?
——Nowhere near that. It ____.

A．may have been good

B．couldn’t have been worse

C．can’t be better

D．must be better

题型：不详难度：| 查看答案

---Imagination important in science, and it helps us dream up our future.
---You are definitely right. If only something allow me to see insects and spiders magnified without getting close to them.

A．was; would

B．is; will

C．will be; can

D．is ;could

题型：不详难度：| 查看答案