16. Nobody noticed the thief slip into the house because the lights happened to__________.

　　A. put up B. give in C. be turned on D. go out

　　17. Besides Tom, ________ Crosettes have two other sons, __________ of whom are all interested in making model planes.

　　A. 不填; two B. 不填; the two

　　C. the, three D. the, the three

　　18. Mr. Zhang gave all textbooks to all the pupils, except___________ who had already taken tem.

　　A. these B. those C. the ones D. the others

　　19. ____________professional violinist practices for several hours a day, but____________ violinist has his own way of playing the Beethoven concert.

　　A. Each, every B. Every, each C. One, a D. All, each

　　20.—Who has taken my pen away?

　　—__________. He was here a moment ago.

　　A. It must be Li Ping B. It is Li Ping take

　　C. Li Ping is D. Li Ping must take

　　21. My dictionary__________. I have looked for it everywhere but still

　　A. has lost; do not find B. is missing; do not find

　　C. has lost; have not found D. is missing; have not found

　　22. Shortly after the accident, two___________ police were sent to the spot to keep order.

　　A. dozens of B. dozens C. dozen of D. dozen

　　23. —May I have another chocolate?

　　—Yes, of course.___________.

　　A. Take it yourself B. Eat it, please

　　C. Help yourself D. Have it yourself

　　24. We will take________ wants to go there for a sight - seeing.

　　A. whoever B. who C. anybody D. all that

　　25. I caught the last bus from town, but Harry came home___________ that night.

　　A. very late B. even later C. the same late D. the last one

　　26. --What was the party like?

　　--Wonderful. It is years_____________ I enjoyed myself so much.

　　27. Isn't it very kind __________ your parents to do that for us?

　　A. for B to C. about D. of

　　28. There is a _________ of 1000 dollars for the return

　　A. reward B. prize C. thank D. praise

　　29. A man does not know the difficulty of anything_________ he does it personally.

　　A. although B. if C. because D. unless

　　30. I don't remember___________ to the airport that year.

　　A. to be taken B. being taken C. having D. to take