9. The flood was responsible__________ damaging the crop.

​A. of​B. with​C. about​D. for

10. You should concentrate _________what the interviewer is saying and make a real effort to answer all the questions the interviewer asks.

​A. on​B. in​C. at​D. for

11. __________Christmas Eve, people often have parties late at midnight.

​A. in​B. at​C. on​D. from

12. Are you aware ________the time?

​A. with​B. of​C. at​D. about

13. Are you getting __________well at college?

​A. in​B. over​C. off​D. on

14. She has been living in the country________ the beginning of the summer.

​A. for​B. at​C. during​D. since

15. Yesterday, I was talking ______my doctor ______a mysterious epidemics near here.

​A. with/ on​B. to/ about​C. to/ out of​D. with/ over

16. He was happy because his poems had been translated ________several languages.

​A. into​B. for​C. over​D. about

17. Damage to the building resulted________ an usually high wind.

​A. from​B. in​C. about​D. for

18. It was very kind_________ you to give up so much of time to help me.

​A. about​B. for​C. to​D. of

19. Endangered species are plant and animal species which are ________danger of extinction.

​A. on​B. in​C. at​D. by

20. Toxic chemicals in the air and land have also driven many species ______the verge of extinction. 

​A. of​B. about​C. at​D. to