Many people choose to go to the movie theater on weekends. It’s really a good place for people to relax after a week’s hard work. But do you know the following things about movies and movie theaters?

       At first, movies were all very short, sometimes only a few minutes or shorter. The contents (内容) were different from those of today’s movies too. They were mainly about special activities and important things. Later, movies become longer and storytelling. Movies were not shown with sound until the early 1930s and by mid-1930s, some were in full color.
       It’s said that Nickelodeon was the first movie theater in the world and it had 96 seats. The theater got its name from the price of its ticket and the Greek word (希腊语) for theater. It took people a nickel (5分镍币) to get in.
       Over the past few years, movie theaters have developed (发展) very fast. Now, people can watch movies in a more comfortable way.
根据短文内容，回答下列问题。
【小题1】What were the early movies mainly about?
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【小题2】When did people start to see movies with sound?
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【小题3】What is the passage mainly about?
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