an listen to music or watch movies on the internet. it can also help a lot with our study. we can learn much knowledge on different subjects, and get information as soon as possible. but now, some of us work, study or play on the internet for long time, especially for young people to play computer games. it’s bad for our eyes and health. if we make good use of the internet, it will be our best friends and help us a lot .

　　十六、computer

　　computer is a wonderful machine. it's a great invention in many years. it develops very quickly. the smallest computer is as big as a note-book. we call it pocket computer. computer becomes more and more important in many ways. it has touched the lives of everyone, even people in faraway villages. it helps us to do with all kinds of information and we get knowledge from it. it can give us a lot fun.

　　十七、the importance of water

　　of all the things we eat and drink, water is the most important. we can

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