

Prior to taking that medicine, you ought to have consulted your doctor.
A. Perhaps, rather than starting to take that medicine right away, you should talk to a doctor
B. You should only take that medicine after consulting your doctor
C. It was a mistake for you not to have got your doctor's opinion before taking that medicine
D. Had you checked with your doctor first, he would have told you not to take that medicine
Câu B và C khác nhau chỗ nào và mình nên chọn câu nào mới đúng?
A. Perhaps, rather than starting to take that medicine right away, you should talk to a doctor
B. You should only take that medicine after consulting your doctor
C. It was a mistake for you not to have got your doctor's opinion before taking that medicine
D. Had you checked with your doctor first, he would have told you not to take that medicine
Câu B và C khác nhau chỗ nào và mình nên chọn câu nào mới đúng?