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unlocking 。 unlocking C. left。 made 41. She will tell us why she feels so strongly that each of us has a role ________ in making the earth a better place to live in. A. to have played B. to play C. to be played D. to be playing 42. There are five pairs ______, but I’m at a loss which to buy. A. to be chosen B. to choose from C. to choose D. for choosing 43. I’ve worked with children before, so I know what _____ in my new job. A. expected B. to expect C. to be expecting D. expects 44. John rushed out in a hurry, ______ the door _____. A. leaving。 made C. to solve。 understood 39. In order to improve English, ______. A. Jenny’s father bought her a lot of tapes B. Jenny bought a lot of tapes for herself C. a lot of tapes were bought by Jenny D. a lot of tapes were bought by Jenny’s father 40. The key ________ the problem is to meet the demand ______ by the customers. A. to solving。 to understand C. Being。 boring 35. When ______, the museum will be open to the public next year. A. pleted B. pleting C. being pleted D. to be pleted 36. ______ time, he’ll make a firstclass tennis player. A. Having given B. To give C. Giving D. Given 37. The question ______ at the meeting tomorrow is very important. A. discussed B. being discussed C. will be discussed D. to be discussed