The benefits to citizens of modern industrial society may have【C1】______sometime in re cent decades, and increasingly, we are pa

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问题     The benefits to citizens of modern industrial society may have【C1】______sometime in re cent decades, and increasingly, we are paying the【C2】______of pollution of our own nest. In a(an)【C3】______world, everyone would【C4】______personal health, but at the same time would strive to【C5】______planet health. Smart people realize that no personal benefits will【C6】______long in a world that is【C7】______and polluted.
    The really sad part of our current predicament is that all the right ideas have been【C8】______for decades and have been clearly expressed in many【C9】______by a host of intelligent people. The right ideas【C10】______unselfish and compassionate behavior. They include long term planning, conservation and a deep【C11】______to preserving the natural world. Without a healthy natural environment, there will be few or no healthy humans.
    I have been seeing more and more patients who want to【C12】______from city life, air pollution, and chronic illnesses which they【C13】______comes from polluted environments and bad food. One professional man, for example, explained that he and his wife had moved to a【C14】______community and had to commute a long way to work【C15】______the past 20 years -- they went to separate【C16】______and drove two cars. They were driving to a city【C17】______grew out to meet them. The population tripled. When they started commuting, his journey【C18】______less than 30 minutes; 20 years later, the trip each way was 60 minutes【C19】______average; sometimes, when the traffic was bad, they each spent 90 minutes or more in the car, one-fway. Both had become progressively ill. Both decided they would move to a【C20】______town and never commute again.
【C19】

选项 A、in
B、at
C、on
D、for

答案C

解析 该题考点为介词的使用。固定搭配,“平均来说”。此处只有。n能和average搭配使用。其他词组没有该种搭配方法。
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