15-17 CAB 18-20 ABC、21-25 DABCC26-30 DABDB31-35 ABBDC三、36-40 BCDCB41-45 ADABC四、46-50 CDBAD5-55 ACCBB五、56-60 CADEF六、61: have chance of62. as early as possible 63. works harder 64. lost to 65. more enjoyable∵七66. around the neighbourhood 67. the school. competition 68. a sale 69. help him out 70. jump up八、71. spend72. boring73.fun74.with75.us 76. together 77. scored 78. harder: 79. and