Question:
Which sentence is grammatically correct and why?
A. If I knew she was sick, I would visit her.
B. If I had known she was sick, I would visit her.
C. If I had known she was sick, I would have visited her.
D. If I know she was sick, I would have visited her.
C- vì người đó nói nếu ng đó đã biết rằng cô ấy đang ốm thì ng ấy đã đi thăm.
- học tốt-(〃` 3′〃)
b