he is my son,_____ a better son does not exist.

He is my son,_____ a better son does not exist.A.but B.than he is my son,_____ a better son does not exist. He is my son,---------a better son does not exist.(为什么横线上填th he is my son, against whom a better son dose not exist. my son is ill and he has to see a doctor._____. my aunt‘s son is my _____ he is my father's son.but he's not my brother.who is he? Does he have a son?的意思? Question:He is my father's son.But he is not my brother.Who He is a teacher than whom a better dose not exist. Zhang ping is a boy.He is every storong.He is my son.But I'm _____boy is my son.