◎ 题干
Not until ________ the exam ________ the importance of doing homework.
[    ]
A. had he failed; he realized
B. he had failed; did he realize
C. he had failed; he realized
D. had he failed; did he realize
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Not until ________ the exam ________ the importance of doing homework. [ ]A. had he failed; he realizedB. he had failed; did he realizeC. he had failed; h…”主要考查了你对  【部分倒装】  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。