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 . 足够的睡眼可以使我们精力充沛，使我们在考试中表现良好。(make sth. + adj.; enable sb. to do sth.)
Enough sleep________________and________________

3 . 他现在能骑自行车了, 但几星期前他不会。 (用情态动词完成句子)
He can ride a bike now, but________________.

4 . 我想了又想,   但我记不起我在哪里买的词典。(用情态动词完成句子)
I have searched my memory, but I ________________ where I have bought the dictionary.

5 . 令粉丝失望的是，因为各种原因，他们只能在远处观看偶像的表演。（due to）（汉译英）

6 . 只有经过足够的训练，你才能掌握一项技能。
_________ with enough training _________ you master a skill.

7 . 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.

8 . Waking up suddenly________lead to rapid heart rate and high blood pressure.

A．must

B．would

C．can

D．shall

9 . 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

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

A．should

B．must

C．can

D．need