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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 writer gives the example of Automobile Company X to show that______.
选项 A、manufacturers will not take care of pollution control on their own will
B、few manufacturers are aware of the importance of air-pollution control
C、air-pollution control devices are more expensive than other devices
D、people like to buy cars that are equipped with pollution control devices
答案A
解析 从问题本身中的example，show等字眼，我们可以断定这是一道以具体事例问抽象道理的问题，其答案的出处一定是该事例的前一句话，或必须与前一句话相关：unless anti-pollution standards are enforced for all，companies that care about a clean environment will go out of business．
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