--It’s said that no one ______ light a cigarette at a gas station. --- Yes. Safe

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--It’s said that no one ______ light a cigarette at a gas station.
--- Yes. Safety always comes the first.

A．can

B．may

C．shall

D．must

答案

解析

略

举一反三

He has no money nor friends here. That’s why he ______ sleep in the street.

A．must

B．has to

C．should

D．may

题型：不详难度：| 查看答案

---Mary’s score on the test is the highest in her class.
---Really? She ______ have studied very hard.

A．may

B．ought to

C．must

D．should

题型：不详难度：| 查看答案

Whenever he worked until midnight, he _____ drink some coffee to get refreshed．

A．will

B．should

C．must

D．would

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．It was commanded that the coal mine survivors ____ to the nearest hospital for treatment．

A．must send

B．be sent

C．would be sent

D．should send

题型：不详难度：| 查看答案

You ______ worry about their safety．They are old enough to take care of themselves.

A．mustn’t

B．needn’t

C．can’t

D．wouldn’t

题型：不详难度：| 查看答案