Iwouldhavetoldhimtheanswerhaditbeenpossible,butI

问题详情：

I would have told him the answer had it been possible, but I _____ so busy then.

         A. had been                B. were                            C. was                                D. would be 

【回答】

C

知识点：一般过去时及其被动式

题型：选择题