The computer doesn't work. I'm afraid you ________use it today.

A. may

B. can't

C. needn't

D. must

?Must they clean the classroom now?

?No, they ________.

A. can't

B. needn't

C. don't

D. mustn't

?Listen! Helen is singing in the next room.

?It ________be Helen. She has gone to Beijing.

A. can't

B. mustn't

C. may

D. should

A computer ________ think for itself. It must be told what to do.

A. may not

B. can't

C. mustn't

D. couldn't

What ________ the forest of the USA in the last 350 years?

A. has happened to

B. is happened to

C. has happened at

D. is happening

We are supposed ________ the lost child at once.

A. find

B. to finding

C. finding

D. to find

________, she told Ben she was having a surprise party for Joe.

A. First of all

B. All of first

C. Of all first

D. First all of

When people want to relax themselves, they prefer ________ TV or listen to music rather than ________ newspapers.

A. watching; read

B. watching; to read

C. to watch; read

D. to watch; reading

?Do you enjoy your stay in Hangzhou?

?Yes. I've had ________ wonderful time.

A. /

B. a

C. the

D. an

I had the machine ________.

A. repaired

B. repair

C. repairing

D. be repaired