2 . 选词填空。
1. He ________(must/might) get here in time ,but I can’t be sure.
2. He ________(can’t/mustn’t) have missed the train; he arrrived at the train station two hours early.
3. That must be a mistake. No, it ________(can’t/mustn’t) be a mistake.
4. Paul did a great job in the speech contest. He ________(must/can) have practised many times last week.
5. He ________(may/must) be at his office now, but you’d better make a phone to make sure.
6. Look, someone’s in the room. Who ________(can/must) it be ?
7. It ________(must have /may have) rained last night, for the ground is still wet.
8. I don’t know where she is, she ________(may/must) be in Wuhan.
9. With drones’ ability to see ahead, they ________(could/should ) signal any problem, so that fast -moving trains would be able to react in time.
10. I ________(needn’t/can’t) have bought so much wine -only two people came.

3 . 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

6 . There’s no such thing as a free lunch.
Things that are offered for free_________ have a hidden cost. (根据句意填空)

7 . 下列各句均有一处错误，请标出并改正。
1. If my brother was here, everything would be all right.
2. If he hadn’t been caught in the storm yesterday, he will not be ill now.
3. Therefore we strongly suggested that similar events are held every year.
4. The answer sheet must cut from the newspaper and sent to China Daily after the deadline.
5. We must found ways to protect our environment.
6. Some people who don’t like to talk much are not necessarily shy; they must just be quiet people.
7. —It’s the office! So you may know eating is not allowed here.
—Oh, sorry.
8. If you made better use of your time, you might have learned more.
9. Eye doctors recommend that a child’s first eye exam was at the age of six months old.
10. It mustn’ t be the vocabulary that caused you the problem in the exercise because you know a lot of words.

8 . —She is supposed to come at night.
Why hasn’t she turned up yet?
—_________?

A．What do you think may have happened to her

B．What do you think is to happen to her

C．Do you think what have happened to her

D．Do you think what may happen to her