24. The fire was finally brought under control, but not _______ heavy damage had been caused.

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

23. ---Have you seen Bob recently?

---No, but I was told he _______ for a new job all through the summer.

A. has been looking　　　　　　　　　　　　　　　　　　　 B. had been looking　　　

C. is looking　　　　　　　　　　　　　　　　　　　　　　　　 D. was looking

22. I’ve already told you that I’m going to buy it, ________.

A. how much does it cost　　　　　　　　　　　　　　　 B. no matter how it costs

C. however does it cost much　　　　　　　　　　　　 D. however much it costs

21. It was because he would get the chance to travel ______ he wanted to work as a tour guide.

　 A. that　　　　　　　　　　 B. why　　　　　　　　　　　　 C. what　　　　　　　　　　　　 D. where

20. Only under special circumstances ________ not to wear their school uniforms.

A. are students allowed　　　　　　　　　　　　　　　　　 B. allowed are students.

C. students are allowed　　　　　　　　　　　　　　　　　 D. are allowed students

19. It is known that teaching little children is no easy job because it ____enough patience and care.

A. calls on　　 　　B. calls for　　　　　　 　 C. calls off　　　　　　　　　　　　　　 D. calls in

18. The conference has been held to discuss the effects of tourism ______ the wildlife in the area.

A. to　　　　　　　　　　　　 B. on　　　　　　　　　　　　　 C. at　　　　　　　　　　　　　　 D. with

17. We needed a new cupboard for the kitchen. So Peter made ________ from some wood we had.

A. it　　　　　　　　　　　　 B. one　　　　　　　　　　　　　 C. himself　　　　　　　　　　　 D. another

16. Eco-travel is a form of travel that ______ normal tourism with learning and it is more environmentally-friendly.

A. exchanges　　　　　　 B. shares　　　　　　　　　　　 C. combines　　　　　　　　 D. matches

从各题A、B、C、D四个选项中，选出可以填入空白处的最佳答案。

15. Believing that everyone can make _____ world _____ better place on a daily basis, Tom plays his part in protecting the environment.

A. /, a　　　　　　　　　　　 B. the, /　　　　　　　　　　　　 C. the, a　　　　　　　　　　　 D. the, the