单选题 Questions 22 to 25 are based on the following passage.

单选题 What is the concern of ordinary people about the "Greenhouse Effect"?

A、 Whether it can be detected and checked.
B、 Whether it will lead to widespread food shortage.
C、 Whether global warming will speed up in the future.
D、 Whether it will affect their own lives.

【正确答案】 D

【答案解析】[解析] 题干问：“普通人关注温室效应的哪一点?”材料中提到“People have talked about the general problem of "Global Warming" for some time. But they were usually worried about things like whether to buy a home on the coast.”即普通人关心的是自己的生活。所以本题的答案选D。

单选题 What has happened since the end of the Ice Age?

A、 Many species have moved further north.
B、 Many new species have come into existence.
C、 Many species have developed a habit of migration.
D、 Many species have become less sensitive to climate.

【正确答案】 A

【答案解析】[解析] 题干问：“冰河时代末发生了什么?”听力材料中说“Since the Ice Age ended ten thousand years ago and warmer temperatures returned to the northern latitudes, many species have migrated north.”所以本题的答案选A，即很多物种迁移到北部。

单选题 What will be a possible threat to plants in the future?

A、 Storms and floods.
B、 Disease and fire.
C、 Less space for their growth.
D、 Rapid increase of the animal population.

【正确答案】 B

【答案解析】[解析] 题干问：“未来什么将有可能威胁到植物?”听力材料中说“Experts say plants under climate stress will be very open to disease and fire.”这与答案B的意思一致，所以本题答案选B。

单选题 According to the passage, what will probably happen to the endangered species?

A、 They will gradually die out.
B、 They will be able to survive in the preserves.
C、 They will have to migrate to find new homes.
D、 They will face extinction without artificial reproduction.

【正确答案】 A

【答案解析】[解析] 题干问：“根据文章的意思，将要灭绝的物种将怎么样?”材料中说“Any preserves we set up to protect endangered species may become useless as the species are forced to migrate along with their natural homes.”这句话的意思是由于我们所保护的那些将要灭绝的物种将随着自然家园的改变而迁移，那么人们建立的保护区失败，也许会那些将要灭绝的物种就真的会灭绝。所以本题的答案选A。