He is as a“bellyacher - he's always complaining about somthing． [ ] A．who is kno
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![He is as a“bellyacher - he's always complaining about somthing． [ ] A．who is kno](/pic/43_745534.jpg)
He is ________ as a“bellyacher” — he's always complaining about somthing．
[]A．who is known
B．whom is known
C．what is known
D．which is known
试题答案
答案：C
解析：what引导表语从句，what又在从句中作主语。