问题描述：
This is the school that we visited last year和Thi
This is the school that we visited last year和This is the school where i studied three years ago.这两句的引导词第一句中为什么不能用where呢?两句that和where为什么不能互换,老师说不能.不太理解,
This is the school that we visited last year和This is the school where i studied three years ago.这两句的引导词第一句中为什么不能用where呢?两句that和where为什么不能互换,老师说不能.不太理解,
问题解答：
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