Question 48: H...

Câu hỏi: Question 48: He found it extremely difficult to learn this subject.

A. The novel was so interesting that I stayed up all night to finish it. 

B. Though it was an interesting novel, I stayed up all night to finish it. 

C. I stayed up all night to finish the novel so it was interesting.

D. Unless it were an interesting novel, I would not stay up all night to finish it.