“Why didn’t she come to the meeting yesterday？” “I’m not so sure. She ______ ill.”
| A．should be | B．should have been |
| C．must be | D．might have been |
The police still haven’t found her, but they’re doing all they _____.
| A．may | B．can |
| C．must | D．will |
It’s a very kind offer, but I really _____ accept it.
| A．mustn’t | B．needn’t |
| C．can’t | D．don’t |
That car nearly hit me; I ______.
| A．might be killed | B．might have been killed |
| C．may be killed | D．may been killed |
“I called you yesterday. A woman answered, but I didn’t recognize her voice.” “Oh, it _____ my aunt Jean.”
| A．must be | B．must have been |
| C．might be | D．can have been |
“I thought you wouldn’t mind.” “Well, as a matter of fact I don’t, but you _____ me first.”
| A．should ask | B．should have asked |
| C．must ask | D．must have asked |
Their answers are exactly the same — one of them ______ from the other.
| A．must copy | B．must have copied |
| C．should copy | D．should have copied |
Do you think he is lazy？” “I _____ so once, but I don’t now.”
| A．may have thought | B．can have thought |
| C．may think | D．might think |
“Is John coming by train？” “He should, but he _____ not. He likes driving his car.”
| A．must | B．can |
| C．need | D．may |
You _______ pay too much attention to your reading skill, as it is so important.
| A．cannot | B．shouldn’t |
| C．mustn’t | D．needn’t |