问题补充：
---Would you please tell us something about the Group of Eight(G8)?
---Well, G8 is an international organizationthe richest countries in the world, five of which are quite small and two of which are island states.
A. is consisted of
B. consisting of
C. consists of
D. consisted of
答案：
A. is consisted of
(答案→)B. consisting of
C. consists of
D. consisted of
解析：考察分词做定语。固定搭配consist of由…组成；该短语没有进行时，没有被动语态。本句中的consist of….修饰前面的名词an international organization，因为二者构成主动关系，故使用现在分词短语在句中做定语的形式。句意：8国集团是一个由世界上最富有的8个国家组成的国际组织。故B正确。
