I haven't seen you for a couple of days.What have you been u

问题描述：

I haven't seen you for a couple of days.What have you been up ________?A．in B．to C．with D
I haven't seen you for a couple of days.What have you been up ________?
A．in B．to
C．with D．for

1个回答分类：英语 2014-10-25