题目内容：

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短文。短文中共有10处错误，每句中最多有两处。错误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（∧），并在此符号下面写出该加的词。

删除：把多余的词用斜线（＼）划掉。

修改：在错的词下划一横线，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10处，多者（从第11处起）不计分。

When my father bought me a computer as a birthday gift in last year,I felt very exciting.As we all know, computers are getting more and more usefully now.Much informations can be stored in them.We can also learn that has lately happened in the world on Internet.In the past,people had to do lots of work which was very dangerous. Now,but,computers can do it instead.When an exam is coming,I often did some exercises on my computer.Then it will correct it and tell me the right answers.In this way it is more convenient for me to preparing for exams than before.The computer has become my real friend.