问题补充：
The price system is a complex network the prices of all the products bought and sold in the economy as well as those of a great number of services.
A. consisting of
B. consisted of
C. making up of
D. made up
答案：
(答案→)A. consisting of
B. consisted of
C. making up of
D. made up
解析：句意：价格系统是一个复杂的网络，它包括经济方面所有被买进和售出的产品的价格以及大量服务项目的价格。consisting of包含，包括；这里network与consist是主动关系，consist of 没有被动； those＝the＋复数名词，代指the prices。故选A。
