题目内容

I haven’t seen you for a couple of days. What have you been up _____?
A．inB．toC．withD．for
B
考查词组be up to在口语中的含义“计谋什么（坏事）；做什么”。除此以外，be up to还表示时间、地点、程度“到…为止”、“是某人的责任；由某人决定”。
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