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boostK. humanities L. liable M. knowledgeable N. expelled O. stimulated Many people like to save books. If you walk into their home, you are 1 to see anywhere from a single bookshelf to a whole library full of all kinds of books. They have 2 such a wealth of books that the shelves in their study rooms reach up to the ceilings. The 3 book collections they keep on the shelves are dusted and lined up neatly. There are two important reasons why people save books. One reason people save their books is to use them as reference materials. People whose job includes studying a lot of textbooks might feel 4 to save some of those books for future reference. Those interested in electronic equipment keep their books to 5 about the mystery of computer technology and the like. Many families keep encyclopedias (百科全书) for their children to 6 their knowledge. Another reason people save books is to make a good impression. Some think that a library full of the books of the 7 , such as literatures and the books about art and history makes them look 8 . Some people have never 9 to read those books. Also, some people like to show to visitors their wide 10 of tastes and interests. In fact, it’s just a good feeling they want to have.