He has two sons,and ( ) are collage students.

He has two sons,and ( ) are collage students. He has two sons,1.and two of them are teachers.2.two of whom He has two sons,both of whom are teachers.和He has two sons b he has two sons and both are teachers这句话对吗? She has two sons,___are college students. He has three sons ,and all of them are doc the old man has two sons here and he has( )in the united sta He has two sons,who in the same company He has two sons who 1 .He has two sons.Both of 应该填whom还是who are teachers .2.He h He has two sons,both of whom work as chemists. He has two sons,__________ work as chemists. He has two sons,____ works as a chemist.