Mark the letter A, B,...

Câu hỏi: Mark the letter A, B, C or D on your answer sheet to indicate the sentence that best combines each pairs of sentences in the following questions.

A. Although they were rich, but they didn’t have a happy family

B. Rich though they were, they didn’t have a happy family

C. They were rich although they didn’t have a happy 

D. However they were rich, they didn’t have a happy family