24. A cook will be immediately fired if he is found ____ in the kitchen.

　 A. smoke　 B. smoking　 C. to smoke　 D. smoked

23. The research is so designed that once ____ nothing can be done to change it.

　 A. begins　 B. having begun　 C. beginning　 D. begun

22. God helps those who help themselves. That is, you are the very person you should first ______ help.　 A. turn to　 B. turn to ask　 C. turn to for　 D. turn to ask for　

21. I rushed back home in five minutes only ______ nobody there but an April fool of myself.

　 A. to find　 B. found　 C. finding　 D. to have found

20. She ______ to the meeting to be held soon if she really has something urgent to do.

　 A. needn’t to come　 B. doesn’t need come　 C. needn’t come　 D. needs not come

19. _______ have we to go? Well, just one more kilometer.

　 A. How farther　 B. How long　 C. How much farther　 D. How far

18. To burn the midnight oil means to work _____ into the night, _____ is hazardous to health.

　 A. late; that　 B. far; which　 C. deep; that　 D. lately; which

17. We never doubt ______ George Bush, our teacher of English, will turn up on time.

　 A. whether　 B. which　 C. if　 D. that

16. Selecting a satisfactory digital product today is no easy job as technology ____ so rapidly.

　 A. will change　 B. will be changing　 C. has changed　 　D. is changing

15. He planned to visit Shangrila in the May-Day holiday. He must have been there, ____he?

　 A. mustn’t　 B. hasn’t　 C. wasn’t　 D. didn’t