meet up 的用法?

问题描述:

meet up 的用法?
meet up with sb.后面是跟to do sth.
知道的帮我讲解下这个句式的用法`谢谢
有一个选择题是:
On Sundays,Mary meets up with Sandy____about Maths.
A.talks B.to talk C.to talking D.talk
选什么

meet up with vt.意外碰到(不期而遇)
C