I have two sons,one of which is a doctor是什么从句,

I have two sons,one of which is a doctor是什么从句, The old man is proud of his two sons.One is a doctor,( )is a ( )--It seems that one of his two sons is a doctor. --That's He has two sons ,one is a doctor ,the other is a teacher. He has two sons.One son is a doctor .The other son is a teac The old man has two sons.One is a doctor and _ is a teacher. I have two sisters.one is a worker.other one is a doctor. 1.He has two sons.One is a worker,___is a doctor. 21.The old man has two sons.One is a doctor.________ a teach I have two brothers.One is a teacher ( ) is a doctor.A the o I have two brothers.One is a doctor,and ___ is actor. 定语从句~The old woman has two sons,one _____ is a teacher.