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  3. Only the government can ensure that the American people have clean air and pure water. Congress must pass laws to stop manufactu

Only the government can ensure that the American people have clean air and pure water. Congress must pass laws to stop manufactu

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问题     Only the government can ensure that the American people have clean air and pure water. Congress must pass laws to stop manufacturers from polluting the air and water with the waste from their factories.
    Unless anti-pollution standards are enforced for all, companies that care about a clean environment will go out of business. For example, if Automobile Company X spends money to put an air-pollution control device on their automobiles, their cars will be more expensive than the cars produced by another company. People who don’t have the extra money or who don’t care about pollution will not buy the more expensive cars. Automobile Company X will go bankrupt(破产); that is, it won’t make enough money to pay its workers and to buy materials. It will then go out of business. Of course, no automobile company will make itself go bankrupt on purpose, and the pollution of the land and air and water will go on.
    But if the government says that all automobile manufacturers must make cars with air-pollution control devices, the cost of all manufacturers will be equal. So the government cannot let companies decide whether or not they want to stop pollution. The government must force manufacturers to clean up the environment by setting anti-pollution standards for everyone.
The purpose of this passage is______.
选项 A、to describe how a company can go bankrupt
B、to emphasize the urgent need of cleaning up the environment
C、to stress the importance of the government’s role in preventing pollution
D、to tell how difficult it is to keep the environment free from air-pollution
答案C
解析 从文章中的第一、三段的首句，第三段的末句都提及了政府需要采取措施，也只有政府才能做到，由此可以看出政府在控制污染方面作用巨大。
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