◎ 题干
I don't know ______ to answer this question.
[     ]
A. how
B. what
C. where      
D. which
◎ 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“I don't know ______ to answer this question.[ ]A. howB. whatC. whereD. which…”主要考查了你对  【连接副词】  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。