He is___as a 'bellyacher'-he is always complaining about something.A.who is known B.whom is known C.what is known D.which is known为什么不能选B

He is___as a 'bellyacher'-he is always complaining about something.A.who is known B.whom is known C.what is known D.which is known为什么不能选B
He is___as a 'bellyacher'-he is always complaining about something.A.who is known B.whom is known C.what is known D.which is known为什么不能选B

He is___as a 'bellyacher'-he is always complaining about something.A.who is known B.whom is known C.what is known D.which is known为什么不能选B
C.what is known
what is known = a person who is known.
如果直接用who或者whom ,由于who,whom 不知道代什么,不知所云
请在客户端右上角评价点“满意”即可,