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 you ………. to my advice in the first place, you wouldn’t have been in trouble.
If Peter ………., Sarah will be sad because she wants to meet him very much
If his teeth still …….., he will have to go to the dentist’s again.