Their task was similar to ____that______ of their teachers.为什么用that
问题描述：
Their task was similar to ____that______ of their teachers.为什么用that
答
that 代词，这里是为了避免重复，that指代 task
答
跟前面的task明显同类不同物的概念,他们的任务,老师们的任务,都是任务,这叫同类,但不是同一个任务,这叫不同物.其实这里也可以用the one,因为task此处可以认为是可数名词单数,但一个空就只能用that了