题目

 20世纪50年代在婆罗洲的许多雅克人身患疟疾，世界卫生组织采取了一种简单的 也是直接了当的解决方法：喷射DDT。蚊子死了，疟疾也得到了控制。可是没多久，大范围的后遗症出现了。由于DDT同时还杀死了吃屋顶茅草的毛虫的天敌——小黄蜂，导致人们的房屋纷纷倒塌。与此同时DDT毒死的虫子后来成为壁虎的粮食，壁虎又被猫吃掉，DDT无形中建立了一种食物链，对猫造成杀伤力，猫数量的减少又导致了老鼠大量繁殖起来。在其一手造成的有大规模 听下面9段对话。每段对话后面有一个小题，从题后所给的A、B、C三个选项中选出最佳选项。 (     )1. A. America.                             (     )2. A. At 9: 05.                            (     )3. A. A junior school.                     (     )4. A. The radio.                           (     )5. A. Look after her mother.               (     )6. A  yellow one.                          (     )7. A. Her mother.                          (     )8. A. No photos.                           (     )9. A. He fell off the bike and hurt himself. B. England                  B. At 8: 20.                B. An art school.           B. The sun.                 B. Do homework with the boy.B. A blue one.              B. Her aunt.                B. No parking               B. His bike was broken.   C. Australia.            C. At  8: 45.           C. A high school.        C. The weather.          C. Do homework at home.    C. A green one.            C. Her father.             C. No smoking.             C  His classmate was hurt.