E-book is short for electronic( 电子的) book. It is usually read on personal computers. Some mobile phones can also be used to read e-books. Earlier e-books were written for a specific group of readers and were about only a few subjects. With the development of the internet, knowledge and answers to a lot of questions mainly come from e-books. This is why the e-book business is increasing quickly E-books have many advantages. First, they save time. We don’t need to go to a bookstore to buy books, besides, we can find the topic we want to know about on the Internet, and then we can quickly get many e-books on similar topics. Second, e-books save money. Some e-books cost a little money, and there are millions of e-books on the Internet that we can get for free. Third, more trees are saved because e-books don’t need to be printed(印刷) on paper. Fourth, e-books make reading more convenient. You can carry a whole library of hundreds of books with you in a small computer or any e-book reader (电子阅读器) without worrying about their weight. But e-books have certain disadvantages. They need a personal computer or an e-book reader and the information can be lost if its file format (文件格式) is not supported or changed in the reader’s computer. However, e-books provide us with a new way of reading. That is good. 根据短文内容，选择最佳答案。 小题1:Why is the e-book business increasing quickly? Because _________. A．earlier e-books are about only a few subjects. B．people don’t like to read any paper books any more. C．most e-books have been written for a specific group of readers. D．the development of the Internet makes e-books more useful. 小题2:How many advantages do e-books have according to this article? A．Three B．Four C．Five D．Six 小题3:Which of the following is true according to this article？ A．E-books can’t be red on mobile phones. B．All the e-books on the Internet cost lots of money. C．E-books can make reading more convenient. D．You can’t read e-books without a personal computer. 小题4:What is the disadvantage of the e-books? A．You’ll lose the information if its file format is not supported. B．You can carry hundreds of books in an e-book reader. C．You can buy cheap e-books anywhere. D．You can read e-books at any time. 小题5: The author mainly tells us __________. A. you don’t need to buy paper books in a bookstore if you read e-books. B. the information can be lost if its file format is changed. C. the development of e-books can help save the environment.