I want to know where she lives和I want to know where she lives in 用法的正确与否区别

题目

I want to know where she lives和I want to know where she lives in 用法的正确与否区别

答案

第一句正确,第二句不对.如果要用lives in,那句子就应该这么来表达：
I want to know which city she lives in.
I want go know which apartment she lives in.