---Where you these days? I haven’t seen you long.---To Britain. I left for London two mon

问题补充：

---Where you these days? I haven’t seen you long.

---To Britain. I left for London two months ago and returned last week .

A. do, go

B. will, go

C. have, gone

D. have, been

答案：

A. do, go

B. will, go

C. have, gone

(答案→)D. have, been

解析：考察时态。根据下文我有很久不见你了。可知前文问的是过去发生现在已完成的事情，故用现在完成时态，瞬间动词不能和these days连用，故选D。