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Extinction is difficult concept to grasp．It is an（26）concept．It's not at all like the killing ofindividual lifeforms that can be renewedthrough normal processes of reproduction．Nor is it simply（27）numbers．Nor is it damage that can somehow be remedied or for which some substitute can beound．Nor is it something that simply affects our own generation．Nor is it something that could beremedied by some supernatural power．It is rather an（28）and final act for which there is no remedy
on earth or in heaven．A species once extinct is gone forever．However many generations（29）us incoming centuries, none of them will ever see this species that we extinguish．Not only are we bringing about the extinction of life（30）, we are also making the land and theair and the sea so toxic that the very conditions of life are being destroyed．（31）basic naturalresources, not only are the nonrenewable resources being（32）in a frenzy ( 疯狂) of processing,consuming, and（33）, but we are also mining much of our renewable resources, such as the verysoil 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 totake place in human affairs, perhaps the greatest, since what we are talking about is not simply anotherhistorical change or cultural（34）, but a change of geological and biological as well as psychologicalorder of（ 35）
第（26）题
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