英语课上，老师要求同桌同学相互修改作文。假设以下小短文为你同桌所写，请你对其进行修改。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：在缺词处加一个漏词符号（∧  ），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。
3．必须按答题要求做题。否则不给分。
I am a senior high school student. In my opinion, the classroom is place for students to gain knowledges. So quietness is badly need for us to learn in the classroom. But recently some students have brought their mobile phones to the classroom and we often hear of the ring of mobile phones. Some of them even wasted precious time in class type short messages on the mobile phones. To keep the classroom quietly and make us focus more on their studies, I suggest that mobile phones shouldn’t be used in the classroom. At least, they should be used where we are having a class.