问题补充:
As we all know, China is a developing country to the third world.
A. belongs
B. belong
C. belonging
D. belonged
答案:
A. belongs
B. belong
(答案→)C. belonging
D. belonged
解析:考查非谓语动词。句子的谓语是is,不能再用动词原形,排除A、B;country与belong之间是主谓关系,应该用现在分词,作后置定语,相当于which belongs to...。故选C。