15. This is a very interesting book. I’ll buy it,__.

A. how much may it cost　　　　　　 B. no matter how it may cost

C. however much it may cost　　　　 D. how may it cost

14. The two biologists debated ____each other for years ______ the origin of species.

A. with; about　　　　 B. about; for　　 C. between; over　　 C. to; for

13. John rushed out in a hurry, ___________ the door ____________.

A. leaving; unlocked　　　　　　　 B. leaving; unlocking

C. left; unlocked　　　　　　　　 D. sang; singing

12. Mrs. Brown was much disappointed to see the washing machine she had______went wrong again.

A. it repair　 　　 B. it repaired　　　 C. had repaired　　　 D. to be repaired

11. ---What is our earth like ________from the moon?

---Well, our earth, with water ________ 70% of its surface, appears as a "blue ball".

A. seen; covering　　　　　　　　　　　　　　　 B. seen; to cover

C. seeing; covered　　　　　　 　　　　　　　　D. seeing; covering

10. I’d rather have a room of my own, however small it is, than　　　 a room with others.

　　 A. to share　　　 B. to have shared　　 C. share　　　　　　　　 D. sharing

9．It was raining heavily. Little Mary felt cold, so she stood_____ to her mother.

　　 A. close　　　 B. closely　　　　　　　　 C. closed 　　　　　　 D. closing

8. The teacher couldn’t make himself　　　　 attention to because the students were so noisy.

　　 A. to pay　　　　 B. to be paid　　　　　 C. paid　　　　　　　 D. pay

7. My father served in the army in 　　　　when he was in 　　　　.

　 A. 1950s; twenties　　　　　　　　　　　　　　　 B. the 1950s; his twenties

　 C. the 1950s; the twenties　　　　　 　　　　　　 D. 1950s; the twenties

6.-Would you like me to carry this box for you?　

　-_________.I can manage it myself.

A. No, thanks　　　　　　　　　　　　 B. It's a pleasure

C. That would be nice　　　　　　　　 D. Yes, please