1 he came__/__where I was hidding.
1 -----在表达“去- - ,到- - - 时,to可以省略.但如果是from - --时,from不能省略”:I got the news in Beijing,FROM WHERE i arrived / came by train yesterday.
2 he is who is in white 是错的说法,为什么?-----你缺少了表语.
-------正确的表达是:he is the man who is in white.
3 that is what I said 是对的 ---------因为what是表语从句的连接词,也是从句部分的宾语.