29.She ______(save) many people’s lives since she _______(become) a doctor twenty years ago.

30.When I realized my mistake, I regretted not____ 　(take) my mother’s advice.

31. He must be at work at the moment.(改成否定句) 　 He　 ___________ _________ at work at the moment.

32. My mother may be at home now.(改成同义句) 　 ___________ my mother __________ at home now.

33. Parents must stop children from playing computer games too much. (改成含被动语态的句子) 　 Children 　　　 　　　 　　　 　　　 playing computer games too much by parents.

35. The book is Tony’s.(改为同意句) The book 　　　 　　　 .

36. I have a good friend __________ Michael from the USA. 　　 　　A. calls　　　　　 　　B. called　　　　　　　 C. is calling　　　　 D. is called

37. Mike often makes his little sister ____, but yesterday he was made ____ by his sister. A. cry; cry　　 　　B. crying; crying　 　　　　C. to cry; cried　 　D. cry; to cry

38. I think the work ______ on time if we put our time to good use. 　　　　 　 A. was done　　 　B. will do　　　 　　C. can do　 　　　　D. can be done

39. Mum added _______ to the soup but it still didn`t taste _______. 　　 　 A. salt enough; enough salt　　　　　　　 　 B. salt enough; salty enough C. enough salt; enough salty　　　　　　 　 D. enough salt; salty enough