◎ 题干

24.Excuse me, Madame. You still haven’t answered my question yet. Was it at 8 o’clock      
you heard Mr. Croft_______at the door?
A.when; knockingB.when; knockC.that; knockingD.that; knock
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“24.Excuse me, Madame. You still haven’t answered my question yet. Was it at 8 o’clock you heard Mr. Croft_______at the door?A.when; knockingB.when; knock…”主要考查了你对  【并列连词】【从属连词】  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。