I don't know where it is 和 I don't know where he can go 中 where 的用法是否相同?
一共3个问题：
1、I don't know where it is 这句话是否有语病?
2、I don't know where he can go 这句话是否有语病?
3、上面两句中 where 的用法是否相同?