24. There are eight tips in Dr Roger’s lecture on -sleep, and one of them is : 　　to bed early unless you think it is necessary.　 (04重庆)

A. doesn’t go　　 B. not to go　 C. not going　 D. don’t go

23. Laws that punish parents for their little children’s actions against the laws get parents 　　　.　 (04重庆)

A. worried B. to worry　　 C. worrying　 D. worry

22. They see you as something of a worrier, problems 　　　which don’t exist and crossing bridges long before you come to them.　 (04重庆)

A. settling　 B. discovering　　　 C. seeing D. designing

21. Don’t leave the water______ while you brush your teeth.　 (04天津)

　　　 A run　　 B running　　　 C being run　 D to run

20. ______in the queue for half an hour, Tom suddenly realized that he had left his wallet at home.　　 (04北京)

　　　 A To wait　　　 B Have waited　　　 C Having waited　 D To have waited

19. My advisor encouraged______ a summer course to improve my writing skills.　 (04北京)　 A for me taking　　 B me taking　　 C for me to take　 D me to take

18. Mr. Smith, 　　　　　of the 　　　　　speech, started to read a novel.　 (03北京春季)　　　 A．tired; boring　 　　　 B．tiring; bored

　　　 C．tired; bored　　　　　 D．tiring; boring

17. _____ time, he’ll make a fist-class tennis player.　 (03北京)

　 A. Having given　　 B. To give　　　 C. Giving　　　 D.Given

16. The teacher asked us ______________ so much noise.　 (03北京)

　 A. don’t make　 　　 B. not make　 C. not making　　　 D. not to make

15. A cook will be immediately fired if he is found　　　　 in the kitchen.　 (03全国卷) A．smoke　　 B．smoking　　　 C．to smoke D．smoked