根据短文内容和所给中文提示，在空白处写出单词的正确形式，每空限填空一词．

　　John Allen, an American scientist once said, “ the Internet is the world's largest library, but all the 　　1　　(书 ) in it are on the floor!” What he meant is that the Internet is full of 2　　 (信息)．But it can be difficult to find what you really need．The Internet has 　　3　　 (另一个) disadvantage anyone can 　　4　　 （创建）a website, so you can find websites about what ever you can imagine．Unfortunately, a lot of what is written on them is not always true．

　　At the same time, the Internet provides many other things．On some websites, you can download music and films．They are usually very 　　5　　 (便宜) and some are even free．On some other websites, you can connect with people from all over the world．And there are some great online 　　6　　（商店），too．For example，on eBay people 　　7　　 (卖）,used clothes, CDs, and even cars at very low prices．

　　It is true that the Internet has changed the way we work and 　　8　　 (交流)．But we should not depend on it too much．Some people are also afraid that 　　9　　 (网上冲浪）the Internet has taken the place of other healthier activities, especially for 　　10　　 (年轻的) people．Whether you love it or hate it, though, you'd better get used to it because it is right here to stay．