大学英语视听说unit3da an.doc

Part III Directions: Listen to the following recording, and then choose the correct answers to the questions. You will hear the recording twice. After the first playing, there will be time for you to choose the correct answers. Use the second playing to check your answers. 1.Why did the number of pandas drop sharply this century? A. Widespread forest fires. B. The change of bamboo forests into farmland. C. The global warming. D. Increased hunting.2.What is the strange nature of giant pandas mentioned in the passage? A. Peaceful. B. Cheerful. C. Solitary. D. Lonely.3.Why is the breeding program not a success? A. The temperature has changed a lot. B. The rainfall has changed a lot. C. The panda does not like to live in zoos. D. The panda likes to live alone.4.Why did people start debating about the use of cloning in conservation? A. Because this technology is up-to-date. B. Because this technology does not involve a moral issue in animals. C. Because the breeding method is unsuccessful. D. Because the breeding method must be combined with cloning.5.What would be the best title for the passage? A. How to save the giant panda. B. The danger of extinction of the panda. C. The importance of the protection of the panda. D. Success in protecting the panda.Part IVDirections: Choose the best answer to each of the following statements. 1.The Chinese government has been encouraging people to plant trees along the edges of the Gobi Desert. Now those trees act as wind _. A. bars B. barriers C. prevention D. destruction2.Government organizations are helping people to dispose safely old refrigerators or, in the case of cars, to upgrade the air conditioning. A. away B. off C. of D. out of3.As the students grow older, they can be more aware of all the environmental problems that are _. A. happening on B. getting along C. getting on D. going on4.If people throw cigarette butts on the floor, they should _. A. fine B. be fine C. be fined D. get fine5.When the algae die, they are broken _ by the action of the bacteria. A. up B. in C. down D. with6.Statistics show that China invested US$34.6 billion in clean energy last year, _ the United States which invested US$18.6 billion. A. exceeding B. expiring C. excluding D. extruding7.China has already _ some remarkable steps to reduce damage to the environment. A. posed B. gone C. got D. taken8.A thick cloud of pollution covering southern Asia is damaging agriculture and affecting rainfall _. A. extents B. ranges C. degrees D. levels9.A lot of clubs promote environmental safety, and some TV programs, too. They talk about environmental safety and _. A. thing like that B. stuff like that C. such stiff D. such thing10.They