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 . They________ every means, but the engine ________work.

A．tried; couldn’t	B．have tried; won’t
C．tried; won’t	D．have tried; can’t

4 . —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

5 . 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

6 . Hiking trips ________ sound exciting to most kids, but few realize they ________ be uncomfortable and even dangerous.

A．would; should

B．must; should

C．may; can

D．can; will

7 . 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

8 . —I heard our boss suffered great loss because someone had leaked information to our competitor.
—___________ that betrayed us? He was the first to be fired.

A．Must it be Sam	B．Can he be Sam
C．Can it have been Sam	D．Could he have been Sam

9 . 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

10 . —Mom,_____I hang out with Susan now?
—No,you_____.It’s dangerous for two girls to be outside at night.

A．could;can’t

B．could;needn’t

C．should;can’t

D．must;couldn’t