A 12-year-old black boy,I attended a school there ____was otherwise all white

问题描述:

A 12-year-old black boy,I attended a school there ____was otherwise all white
划线部分为什么用that 而不是which,多谢可以用which 怎么翻译好呢这句话

有there or here时只能用that
我,一个12岁的黑人男孩,上了一所全是白人的学校.