◎ 题干
—Why do you look worried?
— Because what I am really concerned about is _____my friend can do me a favor or not..
A.although B.whether C.when D.where
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“—Why do you look worried?— Because what I am really concerned about is _____my friend can do me a favor or not..A.althoughB.whetherC.whenD.where…”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。