Lookingbacknow,ifI

问题详情：

 Looking back now, if I ______the effort in learning the piano then, I would not be who I am.

A didn’t put in                                             B. hadn’t put in

C. wouldn’t have put in                               D. shouldn’t put in

【回答】

B

知识点：过去完成时及其被动式

题型：选择题