Why is so silent in the room? He _________asleep in the room.A．should beB．must b

题型：不详难度：来源：

Why is so silent in the room? He _________asleep in the room.

A．should be

B．must be

C．must have been

D．should have been

答案

解析

考察情态动词。Should意思是应该，must 一定必须。后面接完成时态，表示对已经完成的的动作进行推断。根据题意，房间没为什么如此安静？他一定是在房间内睡着了。到现在还没醒故选B。

举一反三

—You ought to have made an apology to Tom yesterday evening．
—Yes, I know I __ __．

A．ought to have

B．have to

C．should

D．must have

题型：不详难度：| 查看答案

"They didn’t take measures in time, otherwise the explosions ____．"some experts said．

A．wouldn’t happen	B．didn’t happen
C．wouldn’t have happened	D．mustn’t have happened

题型：不详难度：| 查看答案

It was playing computer games that cost the boy plenty of time that he ______ spent doing his lessons.

A．might have	B．should
C．ought to have	D．could

题型：不详难度：| 查看答案

If you were to do it,the result______different.

A．will be

B．would be

C．should be

D．would have been

题型：不详难度：| 查看答案

I really don’t know how to express my thanks to Mr. Li, my high school English teacher, without whose help I__________ to college that year.

A．weren’t to go	B．hadn’t been able to go
C．couldn’t go	D．couldn’t have gone

题型：不详难度：| 查看答案