(1)
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. (2)
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. (3)
A)Storms and floods.
B)Disease and fire.
C)Less space for their growth.
D)Rapid increase of the animal population. (4)
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.
原文：
Passage Three
If the earth gets hotter in the new century, what will happen to animals and the plants which animals depend on for survival? The question offers another way of looking at the "Greenhouse Effect".?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. Biologists and other scientists turn their attention to plants and animals at an important meeting that took place last October. They were reviewed evidence that plants and animals are sensitive to climate. Since the Ice Age ended ten thousand years ago and warmer temperatures returned to the northern latitudes, many species have migrated north. If the predictions about the Greenhouse are correct, temperatures will rise by the same amount in the next one hundred years as they did in the past ten thousand. Will animals and plants be able to adapt that quickly to change in the environment? Many won't. Certain species will probably become very rare. Experts say plants under climate stress will be very open to disease and fire. Forest fires may become more common. That, in turn, man harm animals that depend on the trees for food will for shelter. Any preserves we set up to protect endangered species may become useless as the species are forced to migrate along with their natural homes. Change is a part of life, but rapid change, says scientist George Woodwell, is the enemy of life.
Question 17: What is the concern of ordinary people about the "Greenhouse Effect"??
Question 18: What has happened since the end of the ICE AGE??
Question 19: What will be a possible threat to plants in the future??
Question 20: According to the passage, what will probably happen to the endangered species?