Kids who have no idea what being polite means _______the price s

Kids who have no idea what being polite means _______the price sooner or later.
A、pay
B、paying
C、to pay
D、paid
【正确答案】：B
【题目解析】：mean doing：意味着；mean to do：计划/打算做某事。根据句意，本题运用的是mean doing sth这个结构。