短文改错(共 10 小题；每小题 l 分．满分 10 分）
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(∧)，并在该词下面写出该加的词。
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。
It is reported that thirty cellphones taken away by teachers during the examination and were smashed (销毁) in front of students and parents at a high school. As to this, we hold a heated discussion. There are two different viewpoints about them.
Some think it necessarily. Firstly, with cellphones, students would have focused their attention on studying instead of wasting their precious time reading junk message. Secondly, the examination will be fair if no one cheats using cellphones. However, the others think it otherwise. For one thing, at the age of information, cellphones have become a necessity. For another, students can use cellphones for study.
Personally spoken, even if some students use cellphones for no good reason, we should educate them more than destroy cellphones in such an extreme way.