英语听力教程-第三册-答案.pdfVIP

Unit 1 Is the Earth Being Squeezed Dry? Training Focus Developing the skill of outlining is a major training focus for this unit. And it will remain a training focus for many other units in this book. The content of this unit centers around some environmental issues including global warming, deforestation, water shortage and so on. The listening materials are mainly in the forms of interviews and reports. Please focus on the speaker’s line of thought while listening. You may have a quick look at the outlines in the exercises beforehand so as to obtain some cues about what to come, where to pinpoint the answers, and how to organize the information. You should also pay attention to the special value of some key words in the outlines, such as problems, effects and actions. These key words help single out and group the most important pieces of information in the utterances. Part I Exercise B Listen to two short extractions. Write down the environmental issues mentioned in them. 1. burning of the forests / tree removal (deforestation) / reduction of the world’s rain forests 2. global warming / greenhouse effect / emissions of CO2 Part II Exercise A Listen to the first part of an interview. Note down the key words in the notes column. Then answer the questions. Key: 1. More people more firewood fewer trees More domestic animal more plants fewer available plants more desert move south desert expanding south no grass 2. Growing crops stabilize soil, without them the top soil just blows away. But if there isn’t enough rain the crops don’t grow. 3. People try to grow food to support themselves or the create ranches where cattle can be raised, or to get hardwood for export, or to make way for an iron ore mine. Exercise B