I haven’t seen you for a couple of days. What have you been up _____?
A. in B. to C. with D. for
I haven’t seen you for a couple of days. What have you been up _____?
A. in B. to C. with D. 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”。