the girl ……was my friend.是加who还是whom

the girl ……was my friend.是加who还是whom The girl __came here yesterday is my friend.A who B whom The girl who spoke is my best friend. she was my girl friend, Do you know the girl __is sitting there ,reading who还是 whom Do you know the girl（ ）istalking with Ben? 用who 还是whom The letter __ I received was from my father,用who,which,whom The girl sitting next to me was my cousin.　　→The girl who wa 英语who was it invented by 用who 还是whom? Where my girl friend …… Who"s the girl?He is my friend .这句话哪里错了? The girl _ (who) coat is red is my good friend Han Mei.