China is a country the Third World means her economy still needs developing very much.A.

问题补充：

China is a country the Third World, means her economy still needs developing very much.

A. belongs to, that

B. which is belonging to, that

C. belonging to, which

D. belong to, which

答案：

A. belongs to, that

B. which is belonging to, that

(答案→)C. belonging to, which

D. belong to, which

解析：考查分词做定语和定语从句。第一空的belong to(属于)与country构成主动的关系，所以使用现在分词的形式。第二空which引导非限制性定语从句，指代前面一句话的内容在句中做主语。句意：这个是一个属于第三世界的国家，这就意味着我们这个国家仍然需要进一步的发展。故C正确。