I met a friend of ______ yesterday.选择 mother 还是 mother's

I met a friend of ______ yesterday.选择 mother 还是 mother's 是a friend of my mother对,还是a friend of my mother's对? It was from a good friend of his 后面是填 mother's 还是 mother I met a friend of my father‘s yesterday afternoon?该一般疑问句? I met a friend of mine_____in the street yesterday. 英语选择：my mother met her friend,lucyyesterday.they ＿ miss smith is a friend of mary‘s mother’s 一道英语问题一.单项选择.1.Tony is a friend of .A.Mary's mother's.B.moth My mother met a friend of h______ on her way home. Mary's mother bought a pair of shoes yesterday. Yesterday evening,when I went to town 45 my mother,we met a a friend of my mother's 等于什么?