51. D hope动作发生在had to change动作之前,是“过去的过去”,故用过去完成时。

75.-You must call them every week.　

　-Yes, I _____.　

　A. must B. should C. have to D. will　

　答案及解析

74. Don’t _____ to correct me if I made a mistake.　

　A. pause B. stop C. mind D. hesitate　

73. It is too early in the _____ to expect many visitors to the city.　

　A. time B. hour C. season D. term　

72.-The girls in blue are our new classmates.　

　-I know _____.　

　A. these B. so C. such D. that　

71. There are forty?five students in our class, and they are _____ in terested in football.　

　A. most B. almost C. nearly D. mostly　

70. You can go out _____ you promise to be back before 11 o?clock.　

　A. so that B. as far as　

　C. so long as D. in case　

69. Is there a cinema around _____ I can see a movie?　

　A. that B. which C.swheresD. what　

68. I need some red ink badly, but there?s _____ at hand.　

　A. nothing B. a little C. none D. not　

67.-When are you leaving?　

　-My plane _____ at six.　

　A. took off B. is about to take off　

　C. takes off D. will take off