请问he is one of my father's friends为什么要加ONE

请问he is one of my father's friends为什么要加ONE He is one of my friends.的同义句 he is one of the n____boy in my class He is one of __boys in my class.(nice) He is one of my fellow teachers怎么翻译? He is one of my brother's翻译 He is the only one of my friends who is working hand of my friends 做one的什么成分 This is Li Lei.He is ( ) my friends.A.me B.one of C.he D./ He is one of my friends.（改为同义句） He is a friend（ ）（ ） 一道初二英语填空题阅读下面短文,并借助上下文补充所缺信息.每个空格只能填写一个形式正确、与短文内容意思相符的英语单词. Mr.Brown is one of my friends.He is good at ().He likes to show people how fa he is one of my friend 和 he is friend of mine 不要就只是翻译中文, Yao Ming is good at s_________.He is one of my favourite basketball p______ c is one of my favourite boys i have ever taught.he is handsome and hardworking. He is one of the best persons in my class He is one of the best people in my class 这两句哪一句对 He is one of the best persons in my class He is one of the best people in my class 这两句哪一句对 he is supervisor who attended one of my workshop.怎么翻译,one of在句中的用法. he is one of my good friend的语病在哪,并改错 He is one of ____ friends.A.me B.my C.mine