Although he was very tired, he agreed to help me with my homework. A. Despite being very tired, but he agreed to help me with my homework. B. Tired as he was, he agreed to help me with my h

Đáp án B

Dịch: Mặc dù anh ấy rất mệt, nhưng anh ấy vẫn đồng ý giúp tôi làm bài tập.
Cấu trúc tương phản, đối lập:
Although/Though S V O, S V O = Despite/In spite of N/V-ing, S V O.
=Adj + as/though + S tobe, S V O ( Mặc dù…nhưng…).
Đáp án A sai do thừa “but”.
Đáp án C, D sai cấu trúc ngữ pháp.