20. Three quarters of the students____ from the country.

　　 　A. is　　　　　es　　　　 C. come　　　　　 D. go

19. My father has______ for five years.

　　 　A. left　　 B. arrived　　　 C. been　　　 D .been away

18. She ____to Beijing many times.　

　 　　A. have been　　　 B. has gone　　　 C. has been　　 D. have gone

17. You'd better _____ football in the street.

　　　 A. play　　　 B. not play　　 C. not to play

16. She would like_____ a violin lesson.

　　　 A. have　　 B. to have　　　　 C. having

15.(　 ) Why not ____ help when you were in trouble?

　　　　 A. you ask for　　 B. ask for　　 C. asking for

14. I can't hear the piano piece. Would you mind________?

　　　　 A. turn down the TV　　 B. turn up the TV

　 C. turning the TV up

13.　 Could you please_______?

　　　　 A. do the dishes　　 B. doing the dishes　 C. to do the dishes

12.(　 )If you know_____ who collects old coins, please let me know.

A. anyone else　 　B. else anyone　

C. anyone other　 D. other anyone

11.(　 ) He has been waiting for you for_____ night.

　　 　A. whole　　　 B. whole the　　　 C. the whole　　　 D. the all