Difficult though the exam was, he still passed it with flying colours.

Difficult though the exam was, he still passed it with flying colours.
A. Because the exam was difficult, he passed it with flying colours.
B. Although the exam was difficult, but he still passed it with flying colours.
C. No matter how difficult the exam was, he still passed it with flying colours.
D. The exam was not too difficult, so he could pass it with flying colours.

Đáp án C

Ý câu chỉ quan hệ tương phản, loại A và D.
Ta không dùng đồng thời cả although và but, loại B.

Dịch: Đề đóm khó thế mà cậu ấy vẫn đạt điểm cao
~ C. Dù đề khó như thế nào đi nữa thì cậu ta vẫn điểm cao như thường.