a friend of Mary's sister 与 a friend of Mary's sister's 有什么区别

Mary is a friend of Jim's与Mary is a friend of Jim的区别 a friend of Mary's sister 与 a friend of Mary's sister's 有什么区别 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 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 Mr Black is a friend of ____. A. Mary's mother B.Mary's mother C.mother's of Mary D.Mary's mother 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 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!） miss smith is a friend of mary‘s mother’smary后的’s可否省略 Miss Green is a friend of ____.A.Mary's mother's B.Mary's monther C.Monther's of Mary D.Mother’s of Mary为什么选A不能选D?说明下原因, Miss Green is a friend of（ ） A.mary's mother's B.mary's mother C.mary mother's D.mother's of mary为什么选A不选B 初三一道英语题Miss Green is a friend of（ ）A.mary's mother's B.mary's mother C.mary mother's D.mother's of mary请详细讲解,谢谢. The girl talking to Mary is a friend of (Mary's sister's).括号内的能否用(Mary sister's)和（sister of Mary's)「是语法问题么?说明一下理由,要完整!」 Miss Green is a friend of Mary's mother's 这里为什Miss Green is a friend of Mary's mother's 这里为什么要加两个s peter is a friend of mary's eight year old brother john. a friend of Jim's