题目

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: 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”。—The trip shouldn't take more than an hour.—___.Tt is at least two hours. [     ] A. I guess so                          B. That's itC. You must be joking                  D. It depeds