20. Though having lived abroad for years, many Chinese still __ the traditional customs.　　

A. perfom　　　 B. possess　　

C. observe　　　 D. support

19. ---I’m still working on my project.

---Oh, you will miss the deadline. Time is ____.

A. running out　　 B. going out　

　　 C. giving out　　　 D. losing out

18. The fact that she never apologized ____ a lot about what kind of person she is.

A. says　 B. talks C. appears　 D. declares　

17.Cultural exchange plays an important role in ____ healthy and stable Sino-American relations.

A. furthering　 B. having　

C. increasing　 D. fastening　

16.The police found few people ____ at the　 station and all the buses ____.

A. staying, gone　　　　 B. stayed, gone　

　C. staying, have gone　 D. to stay, had gone

15.Do you have any idea of ____ any chance left?

A. how much not　 B. there not being　

C. there was not　 D. not there being

14.Walter offered us a lift when he was leaving the office, but our work ____ ,we refused the offer.

　A. not finishing　 B. had not been finished　

　C. not having finished D. not being finished　

13.At the meeting they discussed three　 different ____ to the study of mathematics.

A. approaches　 B. means　 C. methods　　 D. ways

12.---I've already asked Suzy three times to come with us and she said no.

---____. She is upset with numerous troublesome problems.

A. It's nothing serious　 B. Don't be silly

C. I have no idea　　　 D. Forget it then

11.Be careful to avoid ____ my feet.

A. stepping　　　 B. stepping on　

C. walking on　 D. to step on