57. Which of the following is a form of man's habitat alteration?

　　A. Glacial encroachment

　　B. Hurricanes

　　C. Dammed rivers

　　D. Snowstorms

　　58. Which of the following has become extinct due to man's destruction?

　　A. African elephant

　　B. Irish elk

　　C. Giant panda

　　D. White Bengal

　　59. Which of the following would be a likely theme for the next paragraph?

　　A. Naturally changing ecological conditions

　　B. Animals that have become extinct

　　C. Achievements of the government Endangered Species Program

　　D. Programs that have destroyed natural habitats

　　60. The tone of this passage is

　　A. nationalistic.

　　B. pro-wildlife.

　　C. anti-wildlife.

　　D. feminist.

　　61. According to this passage,

　　A. man is the cause of some animal extinction.

　　B. animals often bring about their own extinction.

　　C. Congress can absolutely end extinction of animals.

　　D. a law is more important than human responsibility.

　　62. Which of the following is NOT a cause of increasing decline of wild animal population?

　　A. Exploitation

　　B. Pollution

　　C. Habitat alteration

　　D. Congressional law