9.______ a little earlier,I would have caught the train.

问题描述:

9.______ a little earlier,I would have caught the train.
A.Did I leave
B.Would I leave
C.Had I left
D.Have I left

答案选C.Had I left
这是虚拟语气的用法,从句要有过去完成时,且要倒装.