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.
According to the writer, anti-pollution standards ensure that______.

选项 A、no manufacturer will go bankrupt for spending money on pollution control
B、less money will be spent in buying pollution control devices
C、manufacturers know how to control pollution more effectively
D、all manufacturers have to take measures to control pollution

答案D

解析 根据问题关键词anti—pollution standards ensure及问题顺序原则,该问题可以定位到文章最后一句“The government must force manufacturers to help clean up the environment by setting anti—pollution standards for everyone.”
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