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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

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

I haven’t seen you for a couple of days . What have you been up          ?

A．in           B．to            C．with               D．for