1 .He has two sons.Both of 应该填whom还是who are teachers .2.He has two sons,both of 应填whom还是who are teachers.
问题描述：
1 .He has two sons.Both of 应该填whom还是who are teachers .2.He has two sons,both of 应填whom还是who are teachers.
答
应填both of whom
ofwhom=whose=his bothsons
满意就采纳吧,谢谢两个都填whom吗？是的介宾结构of+宾格主语