◎ 题干
It took him half an hour _____ the work.
A.doing    B.to do      C.did
◎ 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 took him half an hour _____ the work. A.doingB.to do C.did…”主要考查了你对  【不定式】【分词】【动名词】  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。