题目

51.  The volunteer devoted all her life to ___________ our environment. (improve) 52.        In the United States, lunch __________ to students for free at school. (offer) 53.        I found a wallet lying in the corner when I __________ the floor yesterday. (sweep) 54.        It is said that the director ___________ another comedy in Shanxi at present. (film) 55.        Do you know which shop he went to __________ the snacks? (buy) 56.  The woman looks excited because her favourite singer __________ on TV last night.  (interview) 57.        People were told that the plane __________ off until the rain stopped. (not take.) 58.        The radio says that the rain __________ for half a day. What can we do? (last) 59.        Must all the rules __________ to the players clearly before the game? (explain) 60.        I’m surprised to find that the price of bread _________ by 15% recently. (rise) 答案：51. improving              52. is offered              53. was sweeping       54.is filming       55. to buy  56. was interviewed57. wouldn’t take     58. will last       59.be explained         60. has risen

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