5. A Great Invention - The Internet

　　The Internet is one of the greatest inventions in modern society. It has changed our lives a lot. We can get information quickly on the Internet. For example, when we do homework, we can search for useful materials. We can also communicate with friends far away through social media. Besides, we can enjoy various forms of entertainment, like watching movies and playing games. However, the Internet also has some disadvantages. Some bad information may mislead us. So we should use the Internet wisely. We should focus on the positive side and make good use of it to improve our lives.

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