He was very tired but he kept on working.

He was very tired but he kept on working.

A. Despite very tired, he kept on working.

B. Though his tiredness, he kept on working.

C. Although he was very tired, but he kept on working.

D. He kept on working although he was very tired.
Xem đáp án
D là đáp án đúng
Lời giải:
Giải thích : : mệnh đề quan hệ chỉ sự nhượng bộ: although: dù – but: nhưng. Một câu chỉ dùng một trong 2 từ này.