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 America is in no immediate danger of "running out of water". People in the West have been aware that water is a precious commodity and must be conserved. In the damp East, an excess of water led to complacency until two factors created con

提问人:ylm发布时间:2021-05-02

 1.The passage is mainly about_____.

  A. water resources of the United States

  B. the renewal processes of water in mature

  C. the importance of water conservation

  D.water pollution in America

  2. The word "drought" in the sentence "First, the periods of drought---ground water supplies." Most probably means_____.

  A. catastrophe of too much rain

  B. danger of running out of water

  C. calamity dry weather

  D. damage caused by typhoon

  3. Water is relatively purer in_____.

  A. fast moving streams and rivers

  B. underground water supplies

  C. mountainous areas

  D. rain and snow

  4. When the author says that lakes have become "wet deserts",._____

  A. he is being angry

  B. he is being optimistic

  C. he is being sad

  D. he is being humorous

  5. It is implied in the passage that______

  A. water can be polluted by deserts

  B. there are many water conservation programs in America

  C. water keeps evaporating from the earth's surface

  D. water is not polluted by waster materials

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