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案例分析题How can we get rid of garbage？ Do we have enough energy sources to meet our future energy needs？ These are two important questions that many people are asking today. Some people think that man might be able to solve both problems at the same time. （83）They suggest using garbage as an energy source， and at the same time it can save the land to hold garbage. For a long time， people buried garbage or dumped it on empty land. Now， empty land is scarce. But more and more garbage is produced each year. However， garbage can be a good fuel to use. The things do not look like coal， petroleum， or natural gas； but they are chemically similar to these fossil fuels. As we use up our fossil fuel supplies， we might be able to use garbage as an energy source. Buring garbage is not a new idea. Some cities in Europe and the United States have been buring garbage for years. The heat that is produced by burning garbage is used to boil water. The steam that is produced is used to make electricity or to heat nearby buildings. In Pairs， France， some power plants burn almost 2 million metric tons of the city’s garbage each year. The amount of energy produced is about the same as would be produced by buring almost a half million barrels of oil.But there are problems in using garbage as a fuel. Garbage that burns easily ， such as food scraps （碎屑） and paper， must be separated from metals， glass， and other materials that do not burn easily. This separation process is normally costly. Another problem is that burning garbage can pollute the air. Our fossil fuel supplies are limited. Buring garbage might be one kind of energy source that we can use to help meet our energy needs. This method could also reduce the amount of garbage piling up on the earth. What two problems can man solve by burning problem?（）
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She thinks that many learning disabilities that children have in elementary school or high school can be traced back to a lack of movement as babies.
Directions： In this part of the test， you are to write a short composition of about 120 to 150 words （non-English majors） or 150 to 180 words （English majors） based on the topic given below. Why I Came to College 1．我为什么选择读大学。 2．现在读大学是否值得。 3．结论。
（85） Prices determine how resources are to be used. They are also the means by which products and services that are in limited supply are disturbed among buyers. The price system of the United States is a very complex network composed of the price of all the products brought and sold in the economy as well as those of numerous services， including labor， professional transportation， and public-utility services. The interrelationships of all these prices make up the system of prices. The prices of any particular product or service are linked to a broad， complicated system of prices in which everything seems to depend more or less on everything else. If one were to ask randomly （随机地） a group of individuals to define price， many would reply that price is an amount of money paid by the buyer to the seller of a product or service as agreed upon in a market transaction （交易）. This definition is， of course， valid as far as it goes. For a complete understanding of a price in any particular transaction， much more than the amount of money involved must be known. Both the buyer and the seller should be familiar with not only the money amount， but with the amount and quality of the product or service to be exchanged， the time and place at which the exchange will take place and the payment will be made， the form of money to be used， and the credit terms and discounts that supply to the transaction， guarantees on the product or service， delivery terms， return privileges， and other factors that comprise the total package being exchanged for the asked-for amount in order that they may evaluate a given price. In the last sentence of the passage， the word they refers to （）.
案例分析题Doctors are starting to find more and more information that suggests a connection between exercise and brain development. According to some research， it seems that exercise can make blood vessels， including those in the brain， stronger and more fully developed. The effects of exercise on brain development can even be seen in babies. Babies who do activities that require a lot of movement and physical activity show greater brain development than babies who are less physically active. Margaret Barnes， a pediatrician， believes in the importance of exercise. （82）She thinks that many learning disabilities that children have in elementary school or high school can be traced back to a lack of movement as babies. In studies with seniors， research has shown that exercise helps older people as well. The exercise doesn’t have to be very difficult. The main goal is just to increase the heart rate. And especially when learning new movements， such as yoga or tai chi， it appears that new memory paths open up in the brain. This can improve people’s short-term memory. According to the passage， how does exercise affect the brain？（）
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