2 . Black holes________not be seen directly so determining the number of them is a tough task.

A．can

B．should

C．must

D．need

4 . 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.

6 . 游客也可花上数小时，一探此地的中国味道与美景声色。（spend...doing sth）(汉译英)

7 . 一星期40英镑，我无法维持生活。
I ______ ______ ______ ￡40 a week.

9 . 写出下列句子中take in的汉语意思。
1. The kind old lady offered to take in the poor homeless stranger.
2. What we collect and take in becomes the source material for what we create.
3. I could hardly take in what the old man said.
4. If you are taken in by someone or something, you are deceived by them, so that you get a false impression of them.

10 . 一个人究竟怎样才能完成这样一个伟大的工程呢？（How）（汉译英）