2. 外语
  3. Each day of Earth Week, for example, has been given over to a separate environmental issue. They are, 【C1】______ , energy effici

Each day of Earth Week, for example, has been given over to a separate environmental issue. They are, 【C1】______ , energy effici

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问题      Each day of Earth Week, for example, has been given over to a separate environmental issue. They are, 【C1】______ , energy efficiency, re-cycling, water 【C2】______ , alternative transportation, pollutant information and outdoor 【C3】______ . Each one, as you can see, is wholly concerned with human problems, human systems, human safety and 【C4】______ how (American) humans can go on living 【C5】______ the same material level over the long haul 【C6】______ messing things up for them-selves. 【C7】______ on that list is there any consideration of what are thought to be animals (or trees or rivers) rights; nowhere any regard for the ongoing 【C8】______ of species caused by humans; nowhere a 【C9】______ for the countless other species that are being 【C10】______ daily by the destruction and poisoning of habitats; nowhere any thought given to the 【C11】______ of the natural systems of the living earth and learning to live in them as the first people did. 【C12】______ all, nowhere on the list is there found any consideration of wilderness, of the need for a healthy earth to have places where humans don’t 【C13】______ , where the full complexity and diversity of life are allowed to 【C14】______ unaffectedly. All that the Earth Day people can see is something called "just think of the 【C15】______ " of "outdoors", and all they can think of doing there is human "recreation".
     The reason that is important is that 【C16】______ the human understands itself as a species "reapplies for membership in the biosphere", as the eco-historian Thomas Berry has 【C17】______ it, "it will never stop treating the earth and its treasures (resources) as the rightful food for its omnivorous maw (杂食性动物的胃), will never stop acting as if it owns the earth and has the right of control 【C18】______ its species". This is a matter of passing laws or double-panning windows; this is a deep reordering of values, a new (and very’ old) way of understanding the earth and its species as sacred, an ecological 【C19】______ that go right to the heart of our lives. Without it no 【C20】______ changes will come, or last.  
【C16】
选项 A、until
B、unless
C、if
D、though
答案A
解析 根据上下文可知，直到人类将自己看成是地球上的一个物种，他们才会停止将地球和地球上的资源看成是他们正当的食物，故A until为答案。
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