Dear Jack,

　　Thank you for your letter asking about our discussion on low carbon lifestyle. Here is something about it.
　　Everyone knows that we can do a lot of things in order to live a   low-carbon life.
　　Firstly, we should save water and electricity. Secondly, we had better sort out rubbishes, which include recyclable and non-recyclable rubbishes. Thirdly, we could re-pick up our handkerchiefs, and use tissues as little as possible so we can stop more tress from cutting down.   Last but not least, please try to walk if you have more free time, and ride bikes or take buses as often as possible.
　　Best wishes,                                                                                                                                          Li Bing

　　Example 8： Shopping on the Internet 网购利弊
　　随着互联网的发展和普及，网络购物在中国也变得越来越普遍了，甚至已经成了我们日常生活的一部分了；相信同学们身边一定有不少同学已经通过网络进行购物了，比如*****网，京东商城等；但是网络购物究竟有何利弊呢? 请写一篇短文，谈谈网上购物的好处与坏处。
　　提示词汇：网上购物shopping on the Internet(online shopping)
　　Recently ,we talk about advantages and disadvantages of  shopping on the Internet. Some people think that it is very easy for us to go shopping online. The shops on Internet ,for example taobao.com, 360buy.com are open for almost 24 hours a day, so we can buy something we want at any time if we like. What's more, we needn't to wait for a long time.
　　However, others believe that we can only see the pictures on the Internet and can not touch or see them, It is difficult to say whether it is good or bad. We will have more problems when the things are not good.   Besides, it is not a good news for some girls because they enjoy going shopping in the market with their friends.