Unit 3 Computers
话题：网上购物
体裁：议论文(分析利弊型)
写作思路：
表明观点(网购有利有弊)；分析利弊。
Online shopping is becoming more and more popular.But like everything else，it has its advantages and disadvantages.On one hand，it is convenient and timesaving because we don't really go out to shop.Besides，there are so many choices that we can compare different items carefully and it is possible for us to buy something good at low price.On the other hand，as we can't see the real objects online，we are likely to buy fake products easily.What's worse，sometimes we have to wait a long time before we can get the goods we buy due t
