—— How do you do ？—— A. How are you ?B. How do you do ? C. Yes I am fineD. Thank you

问题补充：

—— How do you do ？

——

A. How are you ?

B. How do you do ?

C. Yes , I am fine

D. Thank you

答案：

A. How are you ?

(答案→)B. How do you do ?

C. Yes , I am fine

D. Thank you

解析： How do you do ？是初次见面时的问候语，回答的人也用同样的文句 How do you do ？回答。所以答案选B。