-How do you do? -　　 A. How are you? B. How do you do? C. I’m fine.

问题补充：

-How do you do? -

A. How are you? B. How do you do? C. I’m fine.

答案：

解析：情景交际。How are you你好吗；B. How do you do? 你好；I’m fine.我很好。根据上文，你好。可知选B。