3 . 选词填空。
1. Robert is good at languages and ________(can/must) speak four languages.
2. The meeting is very important and you________(would/should) attend it on schedule.
3. I managed to find the street, but I ________(couldn’t/mustn’t) find her house.
4. Every Sunday afternoon, the boy ________(will/may) sit there hour after hour looking at the traffic go by.
5. In his childhood, Jack ________(would/could) be nervous when he met strangers.
6. —Do you have any plan for this weekend?
—I have not decided yet. I________(may/need) take my daughter to the museum.
7. According to the doctor’s advice, the medicine________(might/must) be taken three times a day.
8. No one ________(shall/must) stop us from carrying out the plan.
9. Rose ________(can’t/needn’t) be in the classroom now, because I saw her leave school several minutes ago.
10. Jane asked whether she________(must/could) sit in the empty seat.
11. One of the windows of the classroom ________(won’t/mustn’t) close, so I’ll have it repaired.
12. The headteacher warned him not to be late for school, but Jack ________(wouldn’t/shouldn’t) listen.

4 . 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.

5 . 我们对组织班级活动可能有不同的观点。
We ________different opinions on organizing class activities.

7 . 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)

9 . It’s hard to resist the delicious taste of Gong Bao Chicken. _____ (可以) I learn from you how to cook it?（根据汉语提示单词拼写）