2. 专升本
  3. The world is not only hungry, it is also thirsty for water. This may【B1】______strange to you since nearly 75% of the earth’s sur

The world is not only hungry, it is also thirsty for water. This may【B1】______strange to you since nearly 75% of the earth’s sur

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问题     The world is not only hungry, it is also thirsty for water. This may【B1】______strange to you since nearly 75% of the earth’s surface is covered with water. But almost 97% of this huge amount is sea-water. Man can only drink and use the other 3%—the【B2】______water that comes from rivers, lakes, underground, and other sources. And we cannot even use all of that, because some of it is in the form of icebergs and glaciers. Even worse, some of it has been【B3】______
    At the moment, this small【B4】______of fresh water is still enough for us. However, our demand for water is increasing rapidly. Only if we take steps to【B5】______with this problem now can we avoid a severe worldwide water shortage later on.
    In addition to【B6】______wasting our precious water, one useful step we should take is to develop ways of reusing it.
    Today, in most large cities, water is used only once and it【B7】______returns to the sea or runs into underground storage tanks. But it is possible to pipe water that has been used to a purifying(净化)plant. There it can be filtered and【B8】______with chemicals so that it can be used again just as it were fresh from a spring.
    But even if every large city purified and reused its water, we still would not have enough. Where could we turn next? To the oceans! We can make【B9】______of the vast amount of seawater by【B10】______the salt. This salt-removing process is already in use in many parts of the world.
A. eventually D. number G. dirty J. stopping M. removing
B. deal E. prevent H. treated K. fresh N. make
C. use F. move I. amount L. seem O. polluted
【B3】
选项
答案O
解析 此空应为动词的被动形式，即从treated和polluted中选，由文意可知应为polluted。
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