英语单选.——how I want to have studied harder when I was in school------If you __,you wouldn't work into late every day nowadays.did \should \had\would 选哪一个?我个人选了C

英语单选.——how I want to have studied harder when I was in school------If you __,you wouldn't work into late every day nowadays.did \should \had\would 选哪一个?我个人选了C
英语单选.
——how I want to have studied harder when I was in school
------If you __,you wouldn't work into late every day nowadays.
did \should \had\would 选哪一个?
我个人选了C

英语单选.——how I want to have studied harder when I was in school------If you __,you wouldn't work into late every day nowadays.did \should \had\would 选哪一个?我个人选了C
had,对过去的假设用过去完成时

——how I want to have studied harder when I was in school
------If you A__,you wouldn't work into late every day nowadays.
did \should \had\would ??选哪一个？

A .
因为是过去时，而do是代指 have studied harder when I was in school这件事。

——how I want to have studied harder when I was in school
------If you would,you wouldn't work into late every day nowadays
would