新视野大学英语视听说教程最新版第三册Unit7答案（含听力原文）

IV. Speaking Out

MODEL 1 Our globe is in danger

John: How is your Grandma getting along during this usually hot weather?

Nora: Over the last few years, Granny has been complaining that the hot, humid weather is killing her. She believes the weather has changed.

John: What she means is the climate’s long-term conditions; weather refers only to

day-to-day conditions.

Nora: Yeah, she says summer is hotter, and winter wetter. But I tried to comfort her,

saying, “It’s all in your mind, Granny.”

John: She’s right, you know. The greenhouse effect does bring global warming and rain. Nora: How can I explain global warming and greenhouse gases to a 97-year-old Granny? John: Tell her the earth now is like a real greenhouse made of glass panels that let in

light and trap heat.

Nora: Think she’ll want to know that carbon monoxide from earth makes greenhouse gases?

John: Everybody should know what cause global warming; otherwise we won’t stop it.

Nora: I’ll tell Granny not to burn any more wood or coal, or to use spray on the hair. John: OK, joke about it, but it won’t be so funny when the polar icecaps melt and oceans rise.

Now Your Turn SAMPLE DIALOG

A: How are you getting along during this usually hot weather?

B: Not well at all. Over the last few weeks the hot, humid weather is killing me. I believe the climate has changed.

A: Yeah, the summer is hotter, and winter wetter. B: Do you know why all this has happened?

A: The greenhouse effects bring global warming and rain. B: What do you mean by greenhouse effects?

A: The earth is now like a real greenhouse made of glass panels that let light in and trap heat. You know, carbon monoxide from earth is a greenhouse gas.

B: I see. Everybody should know what cause global warming; otherwise we won’t stop it.

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A: The important thing is that human beings should take steps to reduce global warming.

B: What can we do then? Perhaps we should not burn any more wood or coal. A: Right. Also we should try to produce less CFCs or Freon. B: How can we achieve that?

A: Don’t use aerosol spray on your hair, and depend less on air-conditioners and refrigerators..

B: But it’s hard to give up all this.

A: But we must take action before polar icecaps melt and oceans rise.

MODEL2 Rainforests will soon be only a memory. Script

Susan: Hey, Chris, there is an environmental group on campus asking for donations to save the rainforests. Chris: So what?

Susan: So what?! Don’t you want to save the rainforests?

Chris: But there’re no rainforests in our country. They need hot, tropical climates. Susan: Come on. A rain forest is any forest where heavy rainfall leads to dense vegetation. Tropical rainforests can be found in hoe, tropical areas, but there are also cool rainforests, including one in southeast Alaska. Chris: How did you know that?

Susan: Well, I’ve just read a book on rainforests. You know, 140nillion people live in

the world’s rainforests, and 35 percent of the world’s plant and animal species exist only in rainforests. Chris: Wow, I’m impressed. So what else have you learned?

Susan: Most of the world’s rainforests are in danger of destruction by loggers, farmers and developers. They are disappearing at a rate of 1000 acres a minute!

Chris: It’s terrible!

Susan: Yeah, we’ve got to find a way to save them. Now would you like to give a

donation?

Chris: Sure.

Now Your Turn

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SAMPLE DIALOG

A: Most of the world’s rainforests are in danger of destruction by loggers, farmers and developers. They are disappearing at a rate of 100 acres a minute!

B: What a tragedy! , Many of the world’s plant and animal species exist only in rainforests.

A: We really need to save the beautiful forests. B: Yeah, we’ve got to find a way to save them.

A: Do you know our mayor is making a call to plant trees?

B: Yeah, we do have to plant more trees. I hear China doesn’t have a lot of forests compared with many countries.

A: That’s true. I’ve just read an article about afforestation. China’s forest coverage rate was 18.21percent last yea, ranking only 130th in the world. B: No wonder we have to plat more trees.

A: Don’t lose heart. Progress has been remarkable. In 2000 the rate was just 16.55 percent.

B: Any other good news?

A: China has stepped up its tree-planting efforts. Now it’s the world’s No.1 planter of trees.

B: Wow, I’m impressed.

MODEL3 What a terrible sandstorm! Script

Susan: Hey, John. You’re back. A few days ago, a big sandstorm hit our city John: Oh, that’s bad.

Susan: The air was full of dirt and sand and dust. I had to wear a scarf around my

head.

John: The dust, as I know, comes from Mongolia. And from my reading in science,

I’ve heard the dust often comes after a long period of drought. Susan: This is a serious problem in many parts of the world, and unfortunately our

city is one of them.

John: And if the drought continues, the soil is easily airborne. And then if the wind

comes, the soil can be lifted up on the cold are that rises up, and it can travel very long distances.

Susan: Normally, when there’s a wind, it can clear the air, and you have beautiful

weather. But when the dust is brought in with the wind, then you can’t breathe, you can’t see well, and it’s dangerous for driving, or for walking.

John: Yeah. You know, when the dust is lifted up it can go as high 3,000 meters. And

it’s not just China that has problems, but many other countries. For example, the middle of Australia sometimes has dust storms, and some of the dust goes up

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very high, goes across the ocean, and falls down on New Zealand. Susan: Not a very nice neighbor.

John: Is there a solution to the problem? Susan: We need to plant more trees and grass so that the soil can stay where it is.

John: No wonder the government is launching a new afforestation program in a bid t address the environmental problem.

Now Your Turn

SAMPLE DIALOG

A: I’m so glad to be back home, again. Oh, what a clear blue sky!

B: Yes, the wind has cleared the air. I hope you still remember the situation a couple of years age; that is, when you were here. Each spring a big sandstorm struck our city. A: Oh, that was bad. That air was filled with sand and dust. I had to wear a scarf around my head.

B: I had to cover my mouth and nose with a handkerchief. And facial makes sold well. The dust came from the north, and it often rose after a long dry spell.

A: If the drought continued, the soil was easily airborne. And when the wind came, the soil was swept up on the cold air, and it could travel very long distances.

B: When the dust was brought in with the wind, we could hardly breathe, we couldn’t see well, and it was dangerous for driving. A: How did your town solve the problem?

B: Not only our town. In fact, people in the whole province planted a lot of trees and grass so that the soil would stay where it is.

A: I see. The government launched an afforestation project to deal with the sandstorm. The green shelter belt is playing a role.

V. Let’s Talk

Script

Li: Hi Professor Wang, I’m Li Lin, a correspondent from the University

Newspaper. The staff and students here are getting more and more interested in the relationship between the environment and development. What do you think is the most serious environmental problem at present? What measures should we adopt to improve the environment and develop the economy at the same time?

Wang: There are many environmental problems: air pollution, water pollution,

desertification, over-fishing, destruction of natural habitats, acid train,

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