20. They ordered us __________ near rivers or lakes.

　 A. don’t play　　 B. not to play　　 C. no playing　　 D. without playing

19. My alarm clock didn't　　　　 this morning．I was late for schoo1.　

　 a．work out　　 　b．on time　　 c．break down 　d．go off

18. It’s about 10 years ________ his aunt went to Canada.

　　 A. for　 B. before　 C. since　 D. until

17. We’re amazed at __________ such a big shark..

　 A. saw　　　　 B. seen　　　　　 C. to see　　　　　 D. seeing

16. They have surfed many times before, __________.

　 A. we have so　 B. so we have　　 C. we so have　　 D. so have we

15. The student is afraid ________ English with foreigners.

　　 A. to practice to speak　　 B. practicing speaking　

C. of practicing speaking　 D. of practicing to speak

14. Where _____________ can I find such information?

A. else　　　　 B. others　　　　 C. the others　　　 D. the other

13. The man has lived there ____________.

A. all life　　　 B. all the life　　 C. all his life　　　 D. his all life

12.A number of books ____ gone and the number of lost books ___ growing.

　 A. have, are　 B. has, is　 C. have, is　 D. has are　

11. Jacques Cousteau made it possible to go scuba diving __________ inventing the scuba machine.

A. with　　　　 B. by　　　　　 C. without　　　　 D. since