–She looks very happy. She ________have passed the exam. --I guess so. It’s not

题型：不详难度：来源：

–She looks very happy. She ________have passed the exam.
--I guess so. It’s not difficult after all.

A．should

B．must

C．could

D．might

答案

解析

试题分析：考查情态动词用法。A应该；B必须，一定；C可能；D也许。Must have done一定做了某事；句意：—她看起来很开心。她一定已经通过了考试。—我认为如此。它一点也不难。根据句意说明是对过去所发生的事情的肯定的推测用must have done.故B正确。
点评：情态动词的词义辨析也要放在上下文语境中进行，要注意不同的其它动词与have done连用的词义的差别。

举一反三

Close the door of fear behind you, and you ____ the door of faith open before you.

A．saw

B．have seen

C．will see

D．are seeing

题型：不详难度：| 查看答案

The government requested that all the people ___________ in any indoor public area.

A．not to smoking

B．not smoke

C．not smoking

D．to not smoke

题型：不详难度：| 查看答案

The teacher requested that we ______ the classroom after using it.

A．cleaned

B．cleaning

C．to clean

D．clean

题型：不详难度：| 查看答案

-I didn’t go to the art show, because I lost my ticket.
-You have borrowed mine. I didn’t go to see it anyway.

A．might

B．need

C．could

D．must

题型：不详难度：| 查看答案

—I visited China year.
—That interesting.

A．should have been	B．can be
C．must be	D．must have been

题型：不详难度：| 查看答案