选C。A/B/D都是定语从句,必须要有一个先行词,即WHO
WHOM
WHICH前面要有先行词,此句主句为宾语从句,what兼做主句的宾语和从句的主语
He's
_____as
a
“bellycher"——he's
always
complaining
about
something.
A:who
is
known
B:whom
is
known
C:what
is
known
D:which
is
known
答:C
译:他是那种人们称之为“牢骚包”的--总是在抱怨一些事情。
析:He
is后面是一个名词性从句,只有what从句可担此任。what
is
known
as
...
被称之为“。。。”的“那个啥”,这个what相当于一个名词+that-(从句),当我们不知道用什么名词好时,就用这个what