Complete the following passage with the ...

Complete the following passage with the words in the box. Each word can only be used once(将下列单词填入空格，每空格限填一词，每个单词只能填一次）

Millions of people now use computers for many different things. We often hear that computers have changed our lives for the better, But have they?

Of course computers are useful, and have changed some people’s lives for the better. However, they also   1. problems, too. A large number of people who use computers a lot can get  2.  problems. They find that their eyesight get worse. For example. If they look at the 3.  for too long . There will be injures in computers users’ hands and arms.as people use the keyboard and the mouse too much .people who have computers are also spending more time sitting down and less time4.   ; so many of them are becoming overweight.

Addiction is also a problem with more young people. They can spend hours and hours in chat rooms and surfing the net. Sometimes until very late an night. This means they can’t work or study  5.  and can have problems keeping friends.

Some studies in the unites states have shown that if  6.    spend many hours, they will go with get lonely and upset.

“Computers can be really useful to children. But parents and teachers used to help children to learn to use computers in 7.   and creative ways. ” says teacher Jane Shields. “ And children should also learn when it is time to 8. the computers and head outside to do something different.”