15-17caB18-20AC ,21-25 CADBC 26-30 CBDDC 31-35 BCDBA三、36-40 BDCAC41-45 BBCDA四、46-50 BADCB51-55 CDBCA 56-60 BDACC五、61-65 FADBG六、66. each other67. traffic jam68. went through69. find out 70. was able to play七、71.14 th May72. was in pieces 73. dangerous 74. 20 minutes 75. make the plane safe八、76.tre77. summer(s)78.ut79.catch 80. supermarkets 81. different 82. clothes 83. ride 84. around 85. knows