They get to know each other once they have lunch together by chance.

问题描述:

They get to know each other once they have lunch together by chance.
这么说可以吗
有个不解:为什么要用WILL GET TO KNOW呢?

they will get to know...
根据句子意思得出来的.一旦他们碰巧一起吃午饭,他们就会彼此认识的.
说的是将来的事儿,所以主句用将来时,will get to know
once引导的是条件状语从句,一般将来时用一般现在时代替.