---Would you have helped her had it been possible?---Yes but I busy with my work.A. wasB

问题补充：

---Would you have helped her had it been possible?

---Yes, but I busy with my work.

A. was

B. had been

C. have been

D. am

答案：

(答案→)A. was

B. had been

C. have been

D. am

解析：本题考查时态。根据句意可知，我在忙于我的工作，陈述的过去的事实，故用一般过去时。句意：——如果有可能你会帮助她么？——好的，但我工作很忙。