The price system is a plex 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 ofC.making up ofD.made up
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A解析试题分析：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。考点：考查非谓语动词的用法。点评：本题难度适中。非谓语动词是高中阶段的重难点之一，内容多又杂，不容易理解，需要考生有分析理解复杂的句子结构的能力。题目的设置注重了情景化和结构复杂化，加大了考生对题干句的理解难度。即学即练：Dinosaurs have pletely died out on the earth，never _________ again. A. to be seen B. being seenC. seen D. having been seen解析：A。不定式短语作结果状语的用法。never to be seen again，意为：结果再也没有人见过。