Question

---- 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

Answer 1

A

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。