is known to us all is that America is a developed country the First World.A.Whic
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_____ is known to us all is that America is a developed country _____ the First World.
A.Which; belonging to
B.as; belonging to
C.what; belonging to
D.It; belonging to
试题答案
C
我们都知道美国是属于第一世界的发达国家。第一空是主语从句；第二空是现在分词短语作定语。