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    精英家教网 > 初中英语 > 题目详情

    It is necessary _____ something to protect our environment.


    1. A.
      do
    2. B.
      to do
    3. C.
      does
    4. D.
      doing
    B
    试题分析：此题重点考查固定句型，It is+形容词 for sb. to do sth,“表示做某事对某人来说很adj”在这个结构中，it是形式主语，真正主语是后面的不定式短语，因此排除A、C、D故选B
    考点：固定句型，It is+形容词 for sb. to do sth的用法
    点评：It is +adj+for sb to do   adj应该是对做这件事的评价，该题常常考查不定式，很多同容易出错，同时还要加以区分It is+adj+of sb to do sth  adj应该是对这个人做这件事的评价，adj多用形容人的
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