A

Teens For Planet Earth

This is a social networking site for teenagers who want to get involved in protecting our planet.They can connect with other green-minded teens,choose a project or create their own.Teens For Planer Earth encourages young folks to get busy in their own communities.They offer guidance on local projects with categories such as habitats,animals,water and education.Awards are given to active members.

Meez

At Meez,teens can create their own avatars（头像）,rooms and virtual pets.It is a social community of creative people that combines avatars,virtual worlds and games.Meez offers contests and chat as well as homework help,a fashion central and a writers’ corner.A chat area for younger teens is available.Other areas are music,geek（极客）central,art and sports.

Cyberteens

Cyberteens is another cool site that celebrates the teen years.Here teenagers can find community,games,and news.There is a link called “creativity” where teens can share their poems,stories,photos and artwork.The “cool links” section offers a huge variety of options to the curious teens.This site also has surveys and helps with jobs and school work.

Student.com

Student.com is a resource site for teens and high school students.Its social network has over 900,000 members.Members earn points to win prizes just by browsing and they offer several multi-player games.Points are used to buy items at auction（拍卖会）.Student.com is filled with useful information and articles.

【语篇导读】本文主要内容是写四个不同类型的网站，介绍了四个网站各自的特点和用途