She asked (A) why (B) did Mark look (C) so embarrassed when he (D) saw Carole. A. why B. did Mark look C. did Mark look D. saw
Giải thích
Đáp án B
Cấu trúc: S + asked + WH- + S + V (lùi thì).... (câu hỏi tường thuật)
E.g: “Why did you come back late?” my mother asked
=> My mother asked why I had come back late.
Đáp án B (did Mark look => Mark looked)