As is known to all the financial crisis firstly broke out in the United States the group

问题补充：

As is known to all, the financial crisis firstly broke out in the United States, the group of developed countries.

A. belonging to

B. belonged to

C. belongs to

D. is belonged to

答案：

(答案→)A. belonging to

B. belonged to

C. belongs to

D. is belonged to

解析：考查非谓语动词。逻辑主语the United States与belong to之间为主动关系，故用现在分词作定语，选A。