◎ 题干
—I can't find Mary. Where's she?
—Sorry, I don't know ______.
[     ]
A. where has she been
B. where she has been
C. where has she gone
D. where she has gone
◎ 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“—I can't find Mary. Where's she?—Sorry, I don't know ______. [ ]A. where has she beenB. where she has been C. where has she goneD. where she has gone …”主要考查了你对  【宾语从句】  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。