◎ 题干
—Mary was heard ________ just now. What happened?
—John was telling a joke.
A.to cryB.laughC.to laughD.cry
◎ 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“—Mary was heard ________ just now. What happened?—John was telling a joke.A.to cryB.laughC.to laughD.cry…”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。