参考范文：

I was only nine years old when I learnt how to use a computer. My mother is my first teacher. I know how to type, how to copy a file, and how to visit a web site on the internet. One day, mom was not at home.

I turned on the computer and began to learn how to chat on net. The first one I met there was a boy called tom. He greeted me politely. When he knew that I was only a 9-year-old girl, and almost knew nothing about chatting on net, he started showing me how to use the chatting tools, how to download, and how to send e-mails. I learnt a lot from him.

　　参考译文：

我只有九岁的时候我学会了如何使用电脑。我的母亲是我的第一个老师。我知道如何类型,如何复制一个文件,以及如何访问一个网站在互联网上。有一天,妈妈不在家。

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我打开电脑,开始学习如何上网聊天。我遇到的第一个有一个男孩叫汤姆。他礼貌地跟我打招呼。当他知道我只是一个9岁的女孩,而且几乎一无所知在网上聊天,他开始向我展示如何使用聊天工具,如何下载,以及如何发电子邮件。我从他那里学到了很多。