1.—We never know __A___the old man is.

　　—They say he is a teacher.

　　A.what B.who C.which D.where

　　2. I was told _D___Bill Gates was thirteen he began to play with computers.

　　A. that how B. how that C. when that D. that when

　　3. The socks cost __B__much _____we didn't buy any.

　　A. if; not B. so; that C .too; to D. such; that

　　4. I haven't seen him _B___he left the small town.

　　A. as B. since C. when D. before

　　5. They will give Miss Salina these mushrooms __B__she comes back.

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

　　6.___A__it was dark , we had to stop to have a rest.

　　A. As B. But C. And D. Or

　　7.They will buy some broccoli and carrots if it __B__ tomorrow.

　　A. won't rain B. doesn't rain C. don't rain D. isn't rain

　　8. He has two sons, __B____work as chemists.

　　A. two of whom B. both of whom C. both of which D .all of whom

　　9. I, __B__your good friend, will try my best to help you out.

　　A. who is B. who am C. that is D. what is

　　10. He is a man of great experience, ___D___much can be learned.

　　A. who B. that C. from which D. from whom

　　11.—Do you know the town at all?

　　—No, this is the first time I _B___here.

　　A. was B. have been C. came D. am coming

　　12. I don't like __A__you speak to her.

　　A. the way B. the way in that C. the way which D. the way of which

　　13.There are a lot of students __A__trees on the hill.

　　A. planting B. to plant C. planted D. are planting

　　14. We'd better finish the work as quickly as possible. __C___ seems to be little time left.

　　A. It B. That C. There D. We

　　15. ___B__ lots of trees on the hill.

　　A. There used to being B. There used to be

　　C. There is used to be D. There was used to be