—I you for a long time.Oh I in Beijing. I’ve just come back.A. haven’t seen; amB. didn

问题补充：

—I you for a long time.

--Oh, I in Beijing. I’ve just come back.

A. haven’t seen; am

B. didn’t see; will be

C. haven’t seen; was

D. haven’t seen; have been

答案：

A. haven’t seen; am

B. didn’t see; will be

(答案→)C. haven’t seen; was

D. haven’t seen; have been

解析：句意：我很久没见你了。哦，我去北京了，刚回来。For + 时间段，常于现在完成时连用；根据语境，在北京是一个已经发生了的事情，要用表示过去的时态；have been in一直待在某地，不符合语境；was是一般过去时，对过去的事情进行描述，故选C。