---Hi John. What are you going to do this Sunday?---. Do you have any ideas?A. Nothing se

问题补充：

---Hi, John. What are you going to do this Sunday?

---. Do you have any ideas?

A. Nothing serious.

B. Nothing much

C. No problem

D. Thank you

答案：

A. Nothing serious.

(答案→)B. Nothing much

C. No problem

D. Thank you

解析：Nothing serious.没什么大不了的；Nothing much没什么事；No problem没问题；Thank you谢谢你。句意：嗨，约翰，这个周日你打算做什么？根据下文，你有什么主意吗？可知选B最符合语境。