My Opinion on Campus Flea Market
As we university students progress from one grade to another, we may find that besides other things, we have accumulated a large pile of things that are no longer useful, for example, textbooks, test preparation materials, tapes and CDs. How to deal with the pile is really a big problem. Some throw them away, some keep them as souvenirs, and some sell them in the flea market on campus.
The flea market has much to offer for sellers. Obviously it can help sellers get some money. By selling things that are no longer needed, they can cover some of the original cost. This can be of much importance to students who need money. Last semester I sold about 30 books in the flea market, and the money was enough to cover my food bill for almost a month. Besides, selling things in the flea market can also help sellers cultivate a good habit of making the fullest use of their belongings. This will prevent them from throwing things away at will, thus becoming a thrifty person.
If it just benefits sellers, the flea market can not be so prosperous. In fact, buyers also gain a lot. Things sold in this place are usually much cheaper than the new ones in stores, but the function is almost the same. If students buy their textbooks and other reference books here, they can save about 200 yuan every semester. It is said that second-hand book stores are very popular in foreign countries, and many students from poor families finish their studies by getting most of the books there. In China there are also many students troubled by financial difficulty. If the university authorities can organize a regular flea market, many poor students will find it easier to finish their university.
The third benefit, which is usually neglected, is the positive influence on environment. This may sound irrelevant, but in fact, if we use second-hand products, we can help save paper and printing materials, and this can greatly reduce the negative impact on the already fragile environment. What's more, if we develop the habit of reusing products, we can make our contribution to the establishment of recycling economy that the government is advocating. Experts estimate that if all the textbooks in universities can be used again, we can save about one hundred million yuan in environmental protection. This fully demonstrates the social significance of the tiny market place.
Therefore, if well managed, flea markets on campus can benefit sellers, buyers and the whole society as well. Of course, some of the used things may become valuable souvenirs and we should keep them all our life. As for those things that we can get rid of, we should carry them to the flea market rather than to the dustbin.【正确答案】：
Ⅰ. INTRODUCTION: WAYS TO GET RID OF USED THINGS
Ⅱ. BODY: ADVANTAGE OF FLEA MARKET ON CAMPUS
     ① TO SELLERS
     ② TO BUYERS 
     ③ TO ENVRIONMENT
Ⅲ. CONCLUSION: THE IMPORTANCE OF FLEA MARKET
【题目解析】：本文为一篇议论文，介绍了作者对于大学校园里的跳骚市场的看法。第一段总领全文，介绍了几种处理用过的东西的方法，进而引出文章主要内容：跳蚤市场Ⅰ. Introduction: ways to get rid of used things第2-4段分别从对卖家、买家和环境三个角度阐述了跳骚市场的优点，每段第一句话是主旨句Ⅱ. Body: advantage of flea market on campus ① to sellers ② to buyers ③ to envrionment最后一段为总结段，再次强调了跳骚市场的重要性Ⅲ. Conclusion: the importance of flea market