题目内容：

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1.The World Wide Web allows computer users to ______ information from millions of websites______ the Internet.

2.So as you can see from what I've said, I'm a ______ kind of person. But there is one thing I really love— I'm crazy about football.

3.As a result, cocaine users sometimes have heart ______. Smoking crack cocaine also causes anti-social _______.

4.Users become ______ to crack cocaine much more ______ if they smoke it.

5.While he was still a ______ Mozart was already a big star and ______ Europe giving concerts.