Lookingbacknow,ifI

問題詳情：

 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

知識點：過去完成時及其被動式

題型：選擇題