现在网上购物很流行，假如你的朋友想在网上买一款MP4， 但她不知如何操作，请你根据表格中的提示写一篇短文， 向他介绍网上

Nowadays shopping online is very popular. I think shopping online is very convenient. You can buy anything online you want without leaving home. Shopping online will save much time.
What’s more, it’s often at a low price. If you want to buy an MP4, you can look through the shopping website , type MP4 on the website and you can find all kinds of MP4s. Then choose your favorite. What you must do is to fill in a form including your personal information, such as credit card number, name and address. Finally, click “Enter”. You’ll get the MP4 by mail in a few days.
Make sure the website is safe, or someone can steal your money and other things. Be careful that the MP4 you buy is in good quality. I hope you’ll get a good one.

这是一篇给材料作文，所给材料非常详细，写作中注意从正反两方面介绍网购的优缺点。在写作时要注意时态，人称和固定词组的搭配，要注意语言的规范性。结合材料可知本文主要是一般现在时，注意情态动词的应用。写作中适当使用连词，做到上下文联系紧密，符合逻辑关系。