—I have a sandwich for lunch.

A.What’s your favourite food?B.What do you have for lunch?C.Do you like sandwiches?

【答案】B

【解析】

句意：—你午餐吃什么？—我午餐吃三明治。根据答语午饭吃三明治可知问句在询问午餐吃什么，故选B。