Part I Listening Comprehension （20 minutes）(略) Part Ⅱ Reading Comprehension （35 minutes）
Directions: There are 4 passages in this part. Each passage is followed by some questions or unfinished statements. For each of them there are four choices mared A）, B）, C） and D）.You should decide on the best choice and mark the corresponding letter on the Answer Sheet with a single line through the center.
Passage One
Questions 21 to 25 are based on the following passage:
There are three basic ways in which individual economic units interact with one another. They are the market system, the administered system, and the traditional system.
In a market system, individual economic units are free to interact among each other in the market place. Transactions may take place through barter or money exchange. In a barter economy,real goods such as automobiles, shoes, and pizzas are traded against each other. Obviously, finding some
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