◎ 题干
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It was _____ his mother came in _____ to prepare his lessons.
A.not until; did the boy beginB.until; that the boy didn’t begin
C.until; did the boy not beginD.not until; that the boy began
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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 was _____ his mother came in _____ to prepare his lessons. A.not until; did the boy beginB.until; that the boy didn’t beginC.until; did the boy not beg…”主要考查了你对  【强调句】  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。