大学英语考试复习资料大学四级模拟1071.docx

1、大学英语考试复习资料大学四级模拟1071大学英语考试复习资料大学四级模拟107大学四级模拟107Part WritingDirections:For this part, you are allowed 30 minutes to write a letter of advice to your cousin about how to spend the first winter holiday in college. You should write at least 120 words following the outline given below.问题:1. 机动车被看作是空气污染的

2、首要原因2. 提出解决这一问题的方法3. 并说明原因 One Way to Solve the Problem答案: One Way to Solve the Problem To deal with the air pollution caused by Vehicles in cities is a challenging job. My suggestion is to produce vehicles powered by solar energy. Compared with mineral fuels such as gasoline, solar energy is inexha

3、ustible in supply. The growth of cities and increase of vehicles call for more supply of energy, but there is a limit to the reserve of off. So solar energy with its endless supply is one of our solutions to energy crisis. The second advantage of solar energy is its cleanliness. Traditional vehicles

4、 operating on gasoline give off exhaust, causing damage to human health and polluting the air. From the perspective of environmental protection solar energy is a much better choice. After the new technology becomes economically feasible, the sky over cities will be brighter, and the air will no long

5、er be a threat to our health. Because of the two benefits of using solar energy as a new fuel, we should spend more money on the research which can make our dream come true. Part Reading Comprehension (Skimming and Scanning) A Delicate Balance In 1965 the American statesman Adlai E Stevenson said, W

6、e all travel together, passengers on a little spaceship, dependent on its vulnerable supplies of air and soil. We manage to survive by the care, work, and love we give our fragile craft. Our planet is indeed fragile. Every living thing on this planet is part of a complicated web of life, for no orga

7、nism lives entirely on its own. Every organism is affected by all that surrounds it whether living or nonliving. And in turn each organism has some effect on its surroundings. Even the most elementary understanding of ecology requires knowledge of this cause/effect relationship all organisms have on

8、 each other. Every thing we do to our environment will in one way or another affect the quality of life we experience on this tiny spaceship. If we want the quality of life to be high, we must be more aware that nature is a finely balanced mechanism and that it will not tolerate the abuse we have be

9、en giving it. Consider the following examples of human ignorance concerning the delicate balance of nature. Aswan and Other Fables Once there was a country that desperately needed food and energy for its growing population. It happened that one of the most magnificent rivers in the world flowed thro

10、ugh this country. Each year the river deposited tons of mineral-rich silt on its fertile flood plain before it reached the sea. Why not dam the river, said the countrys leaders, and use the water to irrigate more land, control the annual spring flooding of the river, and provide hydroelectric power

11、all at the same time? The result of this modern-day fairy tale is known as the billion- dollar Aswan High Dam of Egypt, and not all Egyptians are living happily ever after. For one thing, as water backed up behind the dam, almost 100,000 Egyptians had to choose between giving up their family homes a

12、nd being submerged along with ancient and priceless temples that were part of Egypts cultural heritage. But there have been far more devastating results. Now that the Nile River floodplain is deprived of its annual enrichment with silt, artificial fertilizer has to be trucked in at a cost of 100 mil

13、lion dollars a year a cost carried by the subsistence farmers who make, on the average, less than a hundred dollars a year each. Furthermore, now there is nothing to wash away the previous years silt buildup in the soil. And with silt deposits no longer compensating for erosion, the fertile river de

14、lta is shrinking and an alarming part of what remains has completely dried up. Restoring the delta with pumps, drains, and wells may cost more than the dam itself. Ironically, evaporation as well as bottom seepage from the new lake filling in behind the dam is so great that the lake basin may never

15、fill up to predicted levels. So nobody can live around the lake because nobody knows for sure where the shoreline will be. More seriously, there is less water to go around than there was before. And even though some 700,000 new acres (about 1.6 million hectares) have been opened up for agriculture,

16、the population outgrew the potential food increase even before the dam was finished. At the same time, with the nutrient-rich flow of the Nile turned off, another major food source-the sardines, shrimp, and mackerel that flourished in the enriched waters off the delta has declined catastrophically. Worse yet, the lake and the irrigation networks have so accelerated the spread of blood flukes t