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  3. What we don’t know or refuse to recognize is that modern man has been altering his total environment so swiftly and suddenly tha

What we don’t know or refuse to recognize is that modern man has been altering his total environment so swiftly and suddenly tha

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问题     What we don’t know or refuse to recognize is that modern man has been altering his total environment so swiftly and suddenly that the whole "great chain of life" on this planet is in danger.
    All of us live on a tiny spaceship carrying with it its own limited resources for survival.What we have now is all we will ever have to keep us alive.
    But man has been harming this system. He cannot help it. Everything we do alters our environment: the ways we grow food and build shelter and create what we call "culture" and "civilization".
    World population is growing at such a rate that by the year 2050 nearly seven billion people will live on the earth.Industrialization has added its own burden to the population pressure. The more we produce and consume, the more waste products we discharge into the air and water and land around us, where they do not disappear, but last forever in one form or another. Great progress is being made in the productivity of our soil, yet agriculture is now taking more nutrients (营养) from it than are being replaced each year.
    "Ecology", the study of the relationship between life systems and their environment, is what everybody on this planet must now start thinking about quickly if we are to avoid destructive changes within the closed system of our spaceship.
The sentence "He cannot help it" (Para. 3, Line l) most probably means " ______".
选项 A、man cannot avoid destroying the environment
B、man cannot obtain resources he needs from other planets
C、man cannot survive for a long time
D、man cannot help to create a new environment
答案A
解析 本题为细节辨析题。由文章所知，“人们一直以来都在破坏环境，但他们没有办法不这么做，因为他们所做的每件事都是对环境的破坏，比如他们要种植粮食，要建遮风避雨的房子，还要创造文明等”。由于人们不可能不种粮食，不住房子，所以对于环境的破坏是不可避免的。
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