Question

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

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

1. A.
   was
2. B.
   were
3. C.
   had been
4. 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。