【题目】_______ is known to us all is that China is a developing country ______ the Third World.
A. As; belong to B. It; belongs to
C. What; belonging to D. That; belonging to
在线课程【答案】C
【解析】
试题分析：考查主语从句和非谓语动词。句意：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，故选C项。