◎ 题干
It is clever ______ you ______ out the problem.
A.for; to work B.of; workingC.for; working D.of; to work
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“It is clever ______ you ______ out the problem.A.for; to work B.of; workingC.for; working D.of; to work…”主要考查了你对  【主语从句】【表语从句】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。