he is a friend of my brother's 在上下文中必须要he这个人存在么?

he is a friend of my brother's 在上下文中必须要he这个人存在么? He is a friend of my brother's.和He is a friend of my brother 连词成句 of, friend, brother's, he, my, is, a。 the, b He is a old friend of Asmise “s brother 's B brother 's of S 两个句子的区别He is a friend of my brother.He is a friend of my bro he is a good friend of of my father's He is a friend of my father正确还是He is a friend of my father's he is a friend of my mother与he is a friend of my mother’s有什么 He is a friend of my mother 一、单项选择 Tom is my friend.____Mona's brother A.He's B.He c.she Tony is a friend of my brother's. Jimmy is a friend of _______(my brother)是添my brother's 还是my