If only I …………you wanted to invest money in business.
A. had known
B. knew
C. have known
D. know.
Chọn đáp án A
If his teeth still …….., he will have to go to the dentist’s again.
If Peter ………., Sarah will be sad because she wants to meet him very much
If you ………. to my advice in the first place, you wouldn’t have been in trouble.