—Mind your steps as you go or you’ll fall down on to the wet ground.—.A. Not at allB. Tha

问题补充：

—Mind your steps as you go, or you’ll fall down on to the wet ground.

—.

A. Not at all

B. Thank you

C. I don’t

D. Don’t mention it

答案：

A. Not at all

(答案→)B. Thank you

C. I don’t

D. Don’t mention it

解析：四个选项分别表示一点也不、谢谢、我不和不要提了，上文提出好心建议，回应应是表示感谢。所以选B。