I have bought the same dress ( )she is wearing.括号里是as 还是that

I have bought the same dress ( )she is wearing.括号里是as 还是that I have bought the same dress as she is wearing． 请问这句含有the sa I have bought the same dress( )she is wearing.为什么只能填as,而不能填t I have bought the same dress ____she is wearing. she is wearing the same dress that she wore yesterday. I have bought the same dress________she is wearing The dress she is wearing is the same as she's. He bought the same coat that i was wearing yesterday? i have bought the same dress_____you are wearing I have the same book as (the book which)is you bought yester it happened that i bought the same present as tom 是why did she buy the dress 还是用bought