It was an interesting novel. I stayed up kite to finish it.
A. It was interesting novel that I stayed up late to finish it
B. Such an interesting novel it was that I would stay up all night to finish it
C. So interesting the novel was that I stayed up late to finish it.
D. It was such an interesting novel that I stayed up late to finish it
Đáp án là D. are => is. Chia theo chủ ngữ đầu tiên“ the headmaster”