1 . —Sorry, Tony. I’m too busy to attend the meeting this Saturday.
—Well, you ________ attend it if you truly can’t spare the time.

A．shouldn’t

B．needn’t

C．can’t

D．mustn’t

2 . People liked O. Henry’s stories, because simple as the tales were, they ______ finish with a sudden change at the end, to the readers’ surprise.

A．could

B．would

C．might

D．must

3 . —The test is very important to us. Do you think so?
—Yes, so we ________ be too careful during the test.

A．mustn’t

B．daren’t

C．needn’t

D．can’t

4 . This road is narrow and the traffic on it is heavy, so sometimes it ______ be blocked.

A．should

B．shall

C．can

D．need

5 . My nephew William is still a puzzle to me—sometimes he is as quiet as a mouse, while he______be fairly active at other times.

A．should

B．need

C．must

D．can

6 . —— Look at the man in pink over there! Is he John?
—— He ________ be John who is away on a business trip now.

A．shouldn’t

B．mustn’t

C．may not

D．can not

7 . It _________ be quite cold in the mountains at night, so you’d better take a thick coat.

A．would

B．need

C．dare

D．can

8 . In science, facts should be proved by experiments and research, and we ______ always believe everything we read and hear -- even if it is a great story.

A．can not

B．may not

C．must not

D．should not

9 . I asked in the bookshop about Will Dutton’s latest book, but all they           tell me was that it would come out before the end of the year.

A．might

B．must

C．could

D．should

10 . Old age _______ burn and rage at the close of day; rage, rage against the dying of the light.

A．couldn’t

B．should

C．wouldn’t

D．shall