12. I don’t know what to do with my son; he ______ at school.

　A. made trouble　 B. has made trouble

　C. has to make trouble　　 D. is always making trouble

11. He made another wonderful discovery, ____ of great importance to science.

A. which I think is　 B. which I think it is　　 C. which I think it

D. I think which is

10. Tom’s mother kept telling him that it was bad for him to go surfing day and night, but ___didn’t help.

A. he　　 B. she　　 C. which　 D. it

9. I was shown into the waiting-room _____, as I had expected , was full.

A. that　　 B. which　　 C. who　　 D. /

8.-Oh, it’s you, Jay. I ____ you.

　----I’ve just had my hair cut , and I’m wearing new glasses.

A. didn’t recognize　 B. hadn’t recognized　　 C. haven’t recognized　

D. don’t recognize

7. Most of the problems the government had been paying much attention to ____at last.

A. solve　 B. being solved　 C. were solved　 D. had been solved

6. Last year many well-known singers did everything ____help the people in the tsunami-hit countries.

A. they could do　 B. they could to　　 C. that they could do　 D. that they could

5. Someone called up in the middle of the night , but he hung up ____I could answer the phone.

A. as　　 B. since　　 C. until　　 D. before

4. ---Can you tell me the timetable of the school bus?

　 --- Well, the bus ____here for the campus at 7:00 a.m.

A. will leave　　 B. left　　 C. is leaving　 D. leaves

3. The hours ____the children spend in their one-way relationship with television people undoubtedly affect their relationships with real-life people.

　A. that　 B. when　　 C. in which　 D. on which