1 . The principles we are finding in the fruit fly(果蝇)brain-the logic and organization-________be the same as those in human brains. (用适当的词填空)

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.

4 . 为了帮助你更好地学习，听一点莫扎特的音乐可能会让你记忆力更好。（汉译英）

6 . 这可能是他们生活中压力的一个重要原因。
It________ ________ ________ ________ ________of stress in their life.

7 . The magazine ____ Lucy’s. We can see her name on the cover.

A．mustn’t be

B．can’t be

C．must be

D．needn’t be

8 . 站在那儿的人不可能是汤姆。汤姆矮多了。
The man standing there ________ ________ Tom. Tom is much shorter.

9 . 用can或must填空
1. My phone ________have been stolen while I was taking a bus. I can't find it anywhere.
2. I'm hungry. I ________eat two bowls of rice now.
3. You not ________touch other people's head in this country as it will, according to local people, bring had luck to both of you.
4. —Why________ you stay in the countryside where it's not convenient to go shopping?
—Because I've found it beneficial to my health.
5. As far as I am concerned, the air crash ________not have been caused by a bomb attack.
6. You________ not be tired—you've only been working for ten minutes.
7. It is usually warm in my hometown in March, but it________ be rather cold sometimes.
8. Many rare animals are dying out. We________ find ways to protect our environment.