Computer

        Computer is a great invention. It likes our servant to free us from hard work. Computer can be connected to other computer to share information.

         You can leave it on in a long time, but it don not feel tired. But on the safe side, turn it off when you don't need it. And also it can save electricity. But it can also injure you slowly——remember to give your body a rest.

         Use computer in the right way, you will find it a very good servant to work.