On rainy days, accidents _____ happen sometimes on steep roads.A．shouldB．shallC．

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On rainy days, accidents _____ happen sometimes on steep roads.

A．should

B．shall

C．must

D．can

答案

解析

考查情态动词. A. 应该;B.用于第二三人称表示应该;C. 必须;一定 D. 能;会.句意:在雨天,在陡峭的道路上有时会发生事故.选D.

举一反三

－ What does the sign over there say?
－ “No person ____________ bring drinks into the student computer pool.”

A．will

B．may

C．shall

D．must

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—It was cold and the road was icy.
—It a comfortable journey.

A．can’t be

B．shouldn’t be

C．mustn’t have been

D．couldn’t have been

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“ You smoke in the bedroom”, Rose said to her hushand and pushed him out of the room.

A．needn’t

B．mustn’t

C．dare not

D．won’t

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Teachers recommend parents________ their children under 12 to ride bicycles to school for safety.

A．not allow

B．do not allow

C．mustn’t allow

D．couldn’t allow

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---I left my handbag on the train, but luckily someone gave it to a railway official.
---How unbelievable to get it back! I mean, someone ______ it.

A．will have stolen	B．might have stolen
C．should have stolen	D．must have stolen

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