新视野英语视听说教程3答案 Unit7.docx

1、新视野英语视听说教程3答案 Unit7Unit7 Cool it, man. This spray doesnt contain CFC s. And youd better read a little more. In 2003 the hole in the ozone layer shrank by 20 percent, so theres no reason to panic.Q: What does the man mean?Keys: 1.B 2.D 3. A 4.A 5.CIII. Listening InTask 1: We should have proper respec

2、t for nature!ScriptMartha: Do you think most people in your culture respect nature?Ed: I think so. Ummmore now than before.Martha: What do you think is the most serious environment problem in the world today?Ed: TodayI think damage to the ozone layer is a big problem; and another problem is pollutio

3、n in big cities and things like that.Martha: How do you learn about environmental problems?Ed: Ummthrough school. A lot of clubs promote environmental safely, and some TV programs, too. They talk about environmental safely and stuff like that.Martha: Do you think students should learn more about the

4、 environment at school?Ed: I think so. So, as they grow older, they can be more aware of all the problems that are going on. And also to prevent more problems from occurring. Martha: If you could create a new law to help the environment, what would it be?Ed: A new law for the environment? UmmId prob

5、ably say that when people throw away their cigarette butts, they have to throw them into the garbage bin, not just throw them everywhere because its just littering and I hate that. So they should be fined if they throw them on the floor on the ground.Martha: Thats a good idea. What do you personally

6、 do to help protect the environment?Ed: I m so against littering. I never litter. If I see somebody litter, I get really angry. So I always throw my trash into the garbage bin.While being interviewed by Martha, Ed said more people in his culture respect nature ever before. When asked about the most

7、serious environmental problem in the world today, he mentioned the damaged ozone layer and the pollution in big cities.Ed learned about environmental problem at school. A lot of clubs and some TV programs promote environmental safely. He believes that students should learn more about the environment

8、 at school. Then they can be more aware of all the problems and prevent more problems from occurring.When asked about a new law he would like to create to help the environment, he said that when people throw away their cigarette butts, they have to throw them in the garbage bin. They should be fined

9、 if they throw them on the floor.Personally, Ed is so set against littering that he never litters. He always throws his trash into the garbage bin.Task 2: A Work Qualification TestScriptAccording to a report by Australian researchers, the hole in the ozone layer over Antarctica will probably start c

10、losing within five years. They say it may be completely closed within fifty years. The ozone layer protects the Earth from dangerous radiation from the sun. The hole in the ozone layer was discovered over Antarctica almost thirty years ago. At the time, it was three times the size of Australia.The r

11、eport found that ozone-destroying gases in the upper atmosphere were at or near their highest levels in the year2000. But since then, there has bee continuous progress made toward the recovery of the ozone layer. Satellite information showed that levels of ozone-destroying gases in the atmosphere ar

12、e slowly decreasing. At its largest this year, the ozone hole covered more than 15 million square kilometers. That is down from a yearly average of 23 million square kilometers over the last six years.Chlorofluorocarbons, or CFCs, are responsible for destroying part of the ozone layer over Antarctic

13、a. CFCs have been widely used since the1930s in cooling devices such as refrigerators and air conditioners. CFCs remain in the atmosphere for years.Government scientist say the level of chlorine in the atmosphere is decreasing because of restrictions on the use of chlorofluorocarbons. The chemicals

14、were restricted under an international agreement called the Montreal Protocol in 1987. Under the Protocol, developing countries promoted to cut their use of chlorofluorocarbons in half by the year 2005. They also agreed to an eighty-five percent cut by the year 2oo7.Keys: FTTFTFor ReferenceIt was th

15、ree times the size of Australia.They promised to cut their use of CFCs in the half by 2005 and agreed to an 85 percent cut by 2007.Task3: A Mild EI NinoScriptThe EI Nino weather condition has returned. However, official at the United States National Weather Service say EI Nino is weaker than usual t

16、his year. EI Nino is a change in the atmosphere over the Pacific Ocean. It happens every four or five years.Normally, water temperatures in the western Pacific Ocean increase near the end of the year. This cause more rainfall in Indonesia, Australia and other nearby place. At the same time, cold oce

17、an water cause less rainfall in the eastern Pacific Ocean, near South America. The opposite happens during EI Nino. Pacific Ocean temperatures increase near South America, causing unusually high amounts of rainfall there. In contrast, EI Nino causes dry weather in Indonesia and Australia.A strong EI

18、 Nino can severely affect the weather all over the world. The last powerful EI Nino was in 1997 and 1998. It caused major floods in many places. EI Nino also led to extremely dry weather in some other areas. Reports say the weather caused the deaths of about 24,000 people.So experts say having a wea

19、ker EI Nino this year is good news. Meteorologists say rainfall has been higher than usual in South America. The experts say the effects of EI Nino will begin to show in November in the United States. The northern states may have a warmer winter. But, scientists say EI Nino will not be strong enough

20、 to prevent this years powerful storms in the Atlantic Ocean.According to the passage, how often does EI Nino happen?What normally happens in the western Pacific Ocean?What did the EI Nino in 1997 and 1998 cause?What is NOT mentioned as a result of this years EI Nino?What is the central idea of the

21、passage?Kes: 1C 2.A3. D 4.B 5.CFor ReferencePacific Ocean temperatures increase near South America, causing unusually high level of rainfall there. Dry weather results in Australia.IV. Speaking OutMODEL 1 Our globe is in dangerJohn: How is your Grandma getting along during this usually hot weather?N

22、ora: 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 climates long-term conditions; weather refers only to day-to-day conditions.Nora: Yeah, she says summer is hotter, and winter wetter.

23、 But I tried to comfort her, saying, “Its all in your mind, Granny.”John: Shes 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

24、glass panels that let in light and trap heat.Nora: Think shell want to know that carbon monoxide from earth makes greenhouse gases?John: Everybody should know what cause global warming; otherwise we wont stop it.Nora: Ill tell Granny not to burn any more wood or coal, or to use spray on the hair.Joh

25、n: OK, joke about it, but it wont be so funny when the polar icecaps melt and oceans rise.Now Your TurnSAMPLE DIALOGA: 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

26、, 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 monox

27、ide from earth is a greenhouse gas.B: I see. Everybody should know what cause global warming; otherwise we wont stop it.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 sh

28、ould try to produce less CFCs or Freon.B: How can we achieve that?A: Dont use aerosol spray on your hair, and depend less on air-conditioners and refrigerators.B: But its hard to give up all this.A: But we must take action before polar icecaps melt and oceans rise.MODEL2 Rainforests will soon be onl

29、y a memory.ScriptSusan: Hey, Chris, there is an environmental group on campus asking for donations to save the rainforests.Chris: So what?Susan: So what?! Dont you want to save the rainforests?Chris: But therere no rainforests in our country. They need hot, tropical climates.Susan: Come on. A rain f

30、orest 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, Ive just read a book on rainforests. You know, 140nillion peo

31、ple live in the worlds rainforests, and 35 percent of the worlds plant and animal species exist only in rainforests.Chris: Wow, Im impressed. So what else have you learned?Susan: Most of the worlds rainforests are in danger of destruction by loggers, farmers and developers. They are disappearing at

32、a rate of 1000 acres a minute!Chris: Its terrible!Susan: Yeah, weve got to find a way to save them. Now would you like to give a donation?Chris: Sure.Now Your TurnSAMPLE DIALOGA: Most of the worlds rainforests are in danger of destruction by loggers, farmers and developers. They are disappearing at

33、a rate of 100 acres a minute!B: What a tragedy! , Many of the worlds plant and animal species exist only in rainforests.A: We really need to save the beautiful forests.B: Yeah, weve 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 doesnt have a lot of forests com