三个高中定语从句的题目①.I will forever remember Mr.Gao,______ I think i

三个高中定语从句的题目
①.I will forever remember Mr.Gao,______ I think is a good teacher.
I will forever remember Mr.Gao,______ I consider to be a good teacher.
A.who/whom B.which/of whom
C.who/of whom D.which/whom
②.Put the book _____ you found it.
A.the place B.there C.where D.what
③.I now know why Mao impresses everyone who meets him the way ______ he does.
A.which B.what C./ D.now
求讲解= =.
①.A ②.C ③.C
只需要讲解。特别是分析一下句子结构。