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 . 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

5 . With no gravity to push against, astronauts’ bones and muscles ________become weak.

A．should

B．must

C．can

D．need

6 . Although the climate in our city is good, yet the temperature ________ fall to 14 centigrade below freezing point in winter.

A．should

B．shall

C．can

D．may

7 . ________ you make so much noise, Jimmy? Your little sister is still sleeping.

A．Can’t

B．Must

C．May

D．Won’t

8 . We ________ be seen by AI as a small inconvenience that is in the way of the solution to a bigger problem.

A．could

B．should

C．need

D．dare

9 . Mike ________ come to see me this afternoon. I don’t want to go window shopping with you in case he comes.

A．can

B．must

C．may

D．will

10 . If you don 't have a guide,you________ lose your way.

A．must

B．dare

C．should

D．could