45. Visitors ______ not to touch the exhibits.

　　 A. will request　　　　　　　　　　 　B. request　

C. are requesting　　 　　　　　　　　　 D. are requested

44. Selecting a mobile phone for personal use is no easy task because technology _____ so rapidly.

　　　 A. is changing 　　　　　　　　　　 　　B. has changed　　

C. will have changed　　 　　　　　　　　 D. will change

41. The reporter said that the UFO ________east to west when be saw it. 　A．was travelling　　　　　　　　　 　　B．travelled 　C．had been traveling　　　　　　　　　 D．was to travel. 42. The new suspension bridge __________ by the end of last month. 　 　 　 　 A．has been designed 　 　 B．had been designed 　 　 　 　 C．was designed　 　 　 　 　 D．would be designed 43. I’ve won a holiday for two to Florida. I _______ my mum. 　　　 A．am taking　 B．have taken　 C．take　 D．will have taken

40. --- How are you today? 　 --- Oh , I ______ as ill as I do now for a very long time. 　A．didn't fell　　　　　　 B．wasn't feeling 　C．don't fell　　　　　　 D．haven't felt

39. Tony was very unhappy for ___ to the party. 　 　 A. having not been invited　　　B. not having invited 　 　 C having not invited　　　　　 D. not having been invited

38. My uncle ___ until he was forty-five. 　 　 A. married　　　B. didn't married　 C. was not marrying　　　D. would marry

36. The manager entered the office and was happy to learn that four-fifths of the tickets _______ . 　 　 A. was booked　 B. had been booked　 C. were booked　 D. have been booked　 37. Every possible means _______ to prevent the air pollution, but the sky is still not clear. 　 A. is used　　B. are used　C. has been used　 D. have been used　

35. All the preparations for the task ______,and we're ready to start. 　 A. completed　　B. complete　C. had been completed　　D. have been completed

33. －－Hey, look where you are going? 　 　 －－Oh, I'm terribly sorry.＿＿＿＿＿． 　 　 A. I'm not noticing　 　 　 　 　 　 　 　 B.I wasn't noticing 　 　 C. I haven't noticing　 　 　 　 　 　 　 D.I don't noticing 34. Old McDonald gave up smoking for a while, but soon ______to his old ways. 　 A. returned　 B. returns　 C. was returning　 D. had returned

31. Shirley_____a book about China last year but I don't know　whether she has finished it. 　 　 A. has written　　 B. wrote　　 　C. had written　　 D. was writing 32. --Hi, Tracy, you look tired. 　　 --I am tired. I _____the living room all day. 　 　 A. painted　 B. had painted　C. have been painting　D. have painted