21. Having settled in that remote area, the young man quickly _____ to the harsh weather here.

　 A. adept　 B. adopted　 C adapted　 D. adored

20. Although he is always coming on time, he is used _____ later for his class.

A. to have students B. for students’ being C. to students’ being　 D . for students’ to be

19. – Won’t you tell me more about your plan?　 --- I _____ talk about it any more.

　 A. would like to　 B. should like to　 C. would rather not to　 D. would rather not

18. All cars ____ nowadays are equipped with safety belts, _____ is very necessary.

A. being produced ; that 　　　B. to be produced; which　

C. produced ; which　 　　　　D. produced ; they

17. The fish has an air bag, ______ it could stay at a certain depth of water in the sea.

　 A. by which　 B. for which　 C. on which　 D. with that

16. ---Do you think the flight is delayed?　 --It ______ be, especially in ____ bad weather.

　 A. should , such　　 B. might, such a　 C. would , such a　 D. may , such

15. The girl didn’t choose ___ of the dresses and went away without having a look at a third one.

　 A. any　 B. both　 C. all　 D. either

14. – Do you serve tea here?　 --- No, but it _____ a few months ago.

　 A. served　 B. was served　 C. is serving　 D. had been served

13. – I don’t think the movie is worth seeing a second time, _____　？---_____, I agree with you.

　 A. is it ; Yes　 B. is it ; No　 C. do I ; Yes　 D. isn’t it ; No

12. The teacher devoted all her time she had ____ her students.

　 A. to help　 B. helping　 C. helped　 D. to helping