假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号(^)，并在其下面写出该加的词。
删除：把多余的词用斜线(＼)划掉。
修改：在错的词下画一横线，并在该词下面写出修改后的词。
注意：1．每处错误及其修改均仅限一词。
2．只允许修改l0处，多者(从第11处起)不计分。
Dear Mary，
I’m writing to tell you something about how we students use the Internet. As we all know, the Internet is playing a important part in our daily life. We often read news at home and abroad and learning foreign languages by ourselves on the Internet. Sometimes we sent e-mails to our families as well as our friends. Beside, we listen music, enjoy films and play computer games on it. We can even do shopping without 
leaving our homes. However, it has its disadvantages. We waste too much time playing the computer games, that has a bad effect on our studies. What’s worse, the bad information on the Internet do great harm to them. I hope we can make the use of the Internet proper for our studies.
Jennifer