30.They ______ be at home. You see, the door is locked from the outside. A．can’t

题型：不详难度：来源：

30.They ______ be at home. You see, the door is locked from the outside.

A．can’t

B．may

C． must

D． mustn’t

答案

解析

略

举一反三

You_____make such mistakes again.

A．should never	B．should not always
C．would always not	D．would not forever

题型：不详难度：| 查看答案

To appreciate that it"s not easy for you, but you ______ try to get here on time．

A．may

B．must

C．will

D．can

题型：不详难度：| 查看答案

If you had worked hard, you ______ so anxious now．

A．are not

B．would not have been

C．will not be

D．would not be

题型：不详难度：| 查看答案

8．Although this_______ sound like a simple task, great care is needed.

A．must

B．may

C．shall

D．Should

题型：不详难度：| 查看答案

15．---Tom is never late for work. Why is he absent today?
---Something ________ to him.

A．must happen	B．should have happened
C．could have happened	D．must have happened

题型：不详难度：| 查看答案