Mary's friend is quieter than she is .请问这句话后面为什么是she is 怎么不是：Mary's friend is quieter than her.

Mary is a friend of Jim's与Mary is a friend of Jim的区别 mary is studying ()her friend's home填介词 The girl talking to Mary is a friend of ( ) AThe girl talking to Mary is a friend of ( ) A.Mary's sister B.Mary sister's C.Mary's sister's D.sister of Mary's Mrs.Black is a friend of ____?A.Mary's mother's B.Mary's mother C.mother's of Mary D.Mary mother's 为什么? Miss Smith is a friend of A．Mary's mother's B．Mary's mother C．Mother's of Mary D．Mary Mother's Miss Green is a friend of _______.A.Mary’s mother’s B.Mary’s mother C.Mary mother’s D.mother’s of Mary Mr Black is a friend of ____. A. Mary's mother B.Mary's mother C.mother's of Mary D.Mary's mother Mary is my friend.对Mary提问 Mary's friend is quieter than she is .请问这句话后面为什么是she is 怎么不是：Mary's friend is quieter than her. Tom,()my friend,mary.A this‘s B this is C she is D her is Mrs,Sun is a friend of ,A,Mary’s mother,B,mMrs,Sun is a friend of ,A,Mary’s mother,B,mother of Mary,C,Mary ’s mother’s miss smith is a friend of mary‘s mother’smary后的’s可否省略 改错：I think Mary’s best friend is loveliest than she is. The girl talking to Mary is a friend of ________.A.Mary’s sister B.Mary sister’s C.Mary’s sister’s D.Sister of Mary’s到底选什么啊? The girl talking to Mary is a friend of＿. A.Mary's sister B.Mary sister's C.Mary's sister's D.sister of Mary's （答案并解释其原因!） peter is a friend of mary's eight year old brother john. Mary is going to the Children's Park ( ) her friend Lily. 答一下吧 Kate is Mary's