◎ 题干
—Are you _____ now, Dave? I'm visiting you.
—Sorry, I'm _____ vacation with my mother.
[     ]
A. in; in
B. in; on
C. on; on
D. on; in
◎ 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_____ now, Dave? I'm visiting you. —Sorry, I'm_____ vacation with my mother.[ ]A. in; in B. in; on C. on; on D. on; in …”主要考查了你对  【介词】  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。