UNFORTUNATELY, I DON’T KNOW PHILOSOPHY, SO I CAN’T ANSWER YOUR...
Câu 23. Unfortunately, I don’t know Philosophy, so I can’t answer your question.A. If I know Philosophy, I can answer your question.B. If I know Philosophy, I will be able to answer your question.C. If I knew Philosophy, I would be able to answer your question.D. If I had known Philosophy, I would have been able to answer your question.