根据短文内容回答下列问题。
Computers are useful machines. They can help people a lot in their life. They can help people to use little time to do much work , and they can help people to work out many problems(难题) they can't do easily.
Today more and more families have computers. Parents buy computers for their children. They hope computers can help them with their studies in school. But many of their children use computers to play games, to watch movies or to listen to music. Computers cannot help children to study, but make them fall behind(落后). So the parents don't let the ch ildren use the computers again.
In some other countries, some scientists also don't like computers. They say computers let many people lose(丧失) their jobs or bring them a lot of trouble(麻烦). Will computers really bring problems or bring people happiness? Today's students themselves will decide(决定). 
