2. 外语
  3. Extinction is difficult concept to grasp. It is an【B1】______concept. It’s not at all like the killing of individual lifeforms th

Extinction is difficult concept to grasp. It is an【B1】______concept. It’s not at all like the killing of individual lifeforms th

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问题     Extinction is difficult concept to grasp. It is an【B1】______concept. It’s not at all like the killing of individual lifeforms that can be renewed through normal processes of reproduction. Nor is it simply【B2】______numbers. Nor is it damage that can somehow be remedied or for which some substitute can be found. Nor is it something that simply affects our own generation. Nor is it something that could be remedied by some supernatural power. It is rather an【B3】______and final act for which there is no remedy on earth or in heaven. A species once extinct is gone forever. However many generations【B4】______us in coming centuries, none of them will ever see this species that we extinguish.
    Not only are we bringing about the extinction of life【B5】______, we are also making the land and the air and the sea so toxic that the very conditions of life are being destroyed.【B6】______basic natural resources, not only are the nonrenewable resources being【B7】______in a frenzy(疯狂)of processing, consuming, and【B8】______, but we are also ruining much of our renewable resources, such as the very soil itself on which terrestrial(地球上的)life depends.
    The change that is taking place on the earth and in our minds is one of the greatest changes ever to take place in human affairs, perhaps the greatest, since what we are talking about is not simply another historical change or cultural【B9】______, but a change of geological and biological as well as psychological order of【B10】______.
【B4】
选项
答案succeed
解析 空格位于状语从句中的谓语部分，由于前面的主语为复数，主句时态为一般将来时，因此，空格内填入动词的一般现在时。由空格后的in coming centuries可知，此处要表达的意思是：不管在我们之后还有多少代人会继续生存，都不会再看到那些已经灭绝的物种了。succeed意为“接替，继承”。
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