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精英家教網 > 高中英語 > 題目詳情

【題目】I haven't seen you for a couple of days. What have you been up________?

A.in

B.to

C.with

D.for

【答案】B

【解析】be up to sth.在做某事。后一句句意:你一直在忙什么事情?

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