17. If you don’t wait _______ the red light, you will be punished by the policeman.

　 A. at　　 B. under　　 C. for　　　 D. on

解析：at 意为“看见”

16. ---- There is a lot of smoke coming out of the teaching-building there.

---- Really? It _____ be a fire, most probably.

A. can　　　 B. ought to　　　 C. have to　　　 D. must

解析：从most probably.可以看出是很可能, must表示一定

15. ---- You shouldn’t have gone there alone last night.

---- But I ______, because Xiao Wang went there, too.

A. didn’t　　　 B. had to　　　 C. did　　　 D. should

解析：表过去的事实。

14. ______, the concert began.

A. The listeners having taken their seats　　 B. Having taken their seats

C. Having taken their places　　　　　　 D. Taking their seats

解析：独立主格做状语。主语concert 不可能执行take the seat 这一动作，必须加the listeners 做逻辑主语

13. He has got himself into a dangerous situation ______ he is likely to lose control over the plan. A. where　　　　 B. which　　　　 C. where　　　　 D. why

解析：situation, case , point, 等词后常用where引导定语从句 ; occasion 后常用when 引导定语从句。

12. ----Now that you like the computer so much. Why not buy it?

---Well, I can’t afford ______computer.

A. that expensive a　 B. a that expensive C.　 that an expensive　 D. an expensive that

解析：that expensive a = so expensive a　　 “that” 为副词

11. It is fairly common in Africa for there______ a group of expert musicians surrounded by others who also join in the performances.

A. being　　　　　　　　 B. to be　　　　　　　　 C. be　　　　　　　 D. is

解析：there be 结构，用在for sb. to do sth结构中

10. I_____ violin lessons every two weeks, but I think I ‘ll make it every week from next month.

　　 A. am having　　　　　　 B. have had　　　　 C. have　　　　 D. have been having

解析：从后半句可看出现在一直是两周一次。

9.　 ----- Which share is meant for me ?　 ----- You can take _____ half. They are exactly the same.

A. this　　　 B. any　　　 C. each　　　　 D. neither

解析：从half 可知是两半,意思是“你可以拿这一半”还可用either

8. ----- What’s the model plane look like?

　 ----- Well, the wings of the plane are ______ of its body.

A. more than the length twice　　　 B. twice more than the length

C. more than twice the length　　　 D. more twice than the length

解析：more than 修饰twice