2. 外语
  3. The word conservation has a thrifty meaning. To conserve is to save and protect, to leave what we ourselves enjoy in such good c

The word conservation has a thrifty meaning. To conserve is to save and protect, to leave what we ourselves enjoy in such good c

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问题     The word conservation has a thrifty meaning. To conserve is to save and
protect, to leave what we ourselves enjoy in such good condition as others (1)______
may also share the enjoyment Our forefathers had no idea that human population
would increase faster than the supplies of crude materials. Most of them, even (2)______
until very recently, have the foolish idea that the treasures were "limitless"
and "inexhaustible". Most of the citizens of early generations knew little or (3)______
nothing about the complicated and the delicate system that runs all through the
nature, which means that, as in a life body, an unhealthy condition of one part (4)______
will sooner or later be harmful to all others. (5)______
    Fifty years ago nature study was not part of the school work. Scientific (6)______
forestry was a new idea; timber was still cheap at that time because it could be
brought in any quantity from distant woodlands; soil destruction and river floods
were not national problems; nobody had already studied long-term climate cycles (7)______
in relation with proper land use; even the word conservation had nothing of the (8)______
meaning that it has for us today.
    For the sake of ourselves and those who come after us, we must now set about (9)______
repairing the mistakes of our forefathers. Conservation should, however, be made (10)______
a part of everyone’s daily life. To know about the water table in the ground is
just as important to us as a knowledge of the basic arithmetic formulas.
(7)
选项
答案already—yet
解析 用词错误。already用在肯定句中，yet一般多用在否定句或含否定含义的句子中。从否定主语nobody可知，应改already为yet。
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