-Would you have gone shopping had it been possible?-Yes but I busy doing my homew

问题补充：

---- Would you have gone shopping had it been possible?

---Yes, but I busy doing my homework.

A. was

B. were

C. had been

D. would be

答案：

(答案→)A. was

B. were

C. had been

D. would be

解析：问句是一个与过去事实相反的虚拟语气，答语中的 “but”, 引出了一个过去事实,说明不去购物的理由。