Mr.White is ____.a.an old friend of my father's b.an old friend of my father 请问这两个答案有什么区别?选哪个合适

分类: 作业答案 • 2022-07-15 09:48:15

问题描述：

Mr.White is ____.
a.an old friend of my father's b.an old friend of my father
请问这两个答案有什么区别?选哪个合适

答