21. Sam enjoys ______stamps. And now he has 226 of them.

　A. to collect　　　　　 B. collected　　　　 C. collects 　 　　　 D. collecting　

20. Alice asked me ____ another bag for her.

A. get　 　　　　　　　 B. got　 　　　　　　 C. to get　 　　　　 D. getting

19. Don’t ____ too much TV. It’s bad for your eyes.

A. watch　 　　　　　 B. watched　 　　　 C. watching　 　　　　　　 D. to watch

18. His parents were worried that he ______ too much time chatting on line.

A. spent　　　　　　　　 B. cost　　　　　　　　 C. paid　　　　　　　　 D. had

17.. Here’s my little cat. Please __________ it while I’m away.

A. look after　　　　　　　　 B. look up　　　　　　　　　　 C. look for　　　　　　 D. look at

16.They didn’t prepare the speech contest like that, but it _______ very well.

　 A. kept out 　　　　　 B. gave out 　　　　 C. left out 　　　　　 D. worked out

15.Don’t _____the radio. The baby is sleeping.

　 A. turn off　　 B. turn on　　 C. turn over　　 D. turn down

14.We believe scientists will _______ a way to solve the problem of air pollution.

A. set off 　　　　　　　 B. put off 　　　　　 C. come up with 　　　 D. catch up with

13.When he 　　　　　home, he saw his mother cleaning the room.

　　 A. got up　　　　　　　 B. got back　　　　　　 C. got off　　　　　　　　 D. got on

12.. Mr. Smith __________ a talk on country music next Monday.

A. give　　　　　　　　 B. gave　　　　　　　　 C. has given　　　　　 D. will give