he is my son, against whom a better son dose not exist.怎么翻译?从句为什么要用against whom?这是一个选择题， 答案选against whom ， 但还有另外一个答案是than whom, 那个好呢？

This is John,my nephew.He is my ()son she is my d( ) and he is my son William is my aunts son.He is my c______. He is my son,对my son提问 （）（）he? his son is my father.he's my? That boy is my mother's son.He'my( ) He is son of my uncle.的同义句是He is什么son He is my son is后面的是表语吗 he is my father's son.but he's not my brother.who is he? sam is my unle son.He,s my_____________ Question:He is my father's son.But he is not my brother.Who is he?He is your ( ). He is my son,---------a better son does not exist.(为什么横线上填than whom) He is my grandparents'son,but he isn;t my father.He is my ___.A.fatherB.sonC.grandfatherD.uncle He is my aunt's son .He's my () A.brother B.cousin C.uncle He is Bob and he is my uncle's son.的同义句 Willam is my aunt's son.He is my c______.如何填写? The boy is my uncle's son,so he is my c_____ my son is my __________(proud).He can sing and dance very well