◎ 题干

--- Are you  sure you have to ? It's been very late.
--- I don't know _____ I can do it if not now.
A.whereB.whyC.whenD.how
◎ 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“--- Are you sure you have to ? It's been very late. --- I don't know _____ I can do it if not now.A.whereB.whyC.whenD.how…”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。