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】______.
【B6】
选项
答案As regards
解析 空格与其后的名词短语basic natural resources不是句子主干的一部分，因此需要填入介词，构成介词短语。上一句说到了人类对天空、大地和空气的污染，本句则提到了自然资源。As regards意为“至于，关于”。注意空格位于句首，As首字母需要大写。
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