purpose of the program is to provide training for employees so that they can work later.
问题描述：
purpose of the program is to provide training for employees so that they can work later.
为什么是later
答
先弄明白这句话：这个程序的目的是为了给职员提供培训,以便以后他们能工作.
说明做这个程序在前,然后再培训,那们工作是“以后”的事了,所以用副词later来修饰动词work,强调是以后的事,现在还不行.