单项选择题

Questions 17—20 are based on the following passage you have just heard. You have 20 seconds to read Questions 17—20. What has happened since the end of the Ice Age

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

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单项选择题

What is the concern of ordinary people about the Greenhouse Effect

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

填空题

1，100 pounds

Questions 17—20 are based on the following passage you have just heard. You have 20 seconds to read Questions 17—20. What has happened since the end of the Ice Age 您的浏览器不支持 audio 元素。

Questions 17—20 are based on the following passage you have just heard. You have 20 seconds to read Questions 17—20. What has happened since the end of the Ice Age