帮我做道英语选择题呢,关于 consist of,be made up of的~

题目

帮我做道英语选择题呢,关于 consist of,be made up of的~
G 8________ eight richest countries in the world is really powerful。
A：is made up of B：made up of C：consists of D：consisted of
选什么？是不是 G 8 which is made up of eight 这样的。各项帮我分析下，做一下两者比较~

答案

选B,国家不属于生长在物体上的某个部分,所以先排除C D,又因为句子中有真正的谓语,也就是后面的is,所以前面空上只填定语.