这涉及到定语从句连接词的选用 问题
用where 是因为case在定语从句中作地点状语
而用that/which/不填 则是case在定语从句中作宾语或表语I can think of many case ___student know a lot of words and expressions but couldn't write a good essay,这里填的是where，这一句和我题目里的句子有什么区别？you know nothing about +case：case作 介词宾语所以 用that/which/不填 I can think of many case ___student know a lot of words and expressions but couldn't write a good essay（这是某年高考原题） case作地点状语（并非传统理解的“某个地方”）student know a lot of words and expressions but couldn't write a good essay+in manycase觉得懂了，请给满意！