It also keeps a record of the date on which they will travel.中为什么要加on?

分类: 作业答案 • 2021-12-28 10:56:34

问题描述：

It also keeps a record of the date on which they will travel.中为什么要加on?
这句话是不是定语从句,on和travel有关系么?

答

是.travel on the date