I would have paid a visit to you possible.A. if it wereB. would it beC. had it beenD. sho

问题补充：

I would have paid a visit to you possible.

A. if it were

B. would it be

C. had it been

D. should it have been

答案：

A. if it were

B. would it be

(答案→)C. had it been

D. should it have been

解析：考查虚拟语气。根据语境可知为过去事实相反的虚拟语气，故从句用had + 过去分词，故选C。