Had it been possible I would have gone to the movies but I busy.A. had beenB. amC. wasD.

问题补充：

Had it been possible I would have gone to the movies but I busy.

A. had been

B. am

C. was

D. would be

答案：

A. had been

B. am

(答案→)C. was

D. would be

解析：but前的句子是一个与过去事实相反的虚拟语气， but后引出了一个过去事实,说明不去看电影的理由。故用一般过去时。