题目内容：

增加：在缺词处加一个漏字符号（A），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11处起）不计分。

In recent years，campus security have become a hot topic. In Safety Education Day，I was honored to be a volunteer raise the primary school students' awareness of safety. I told those students about things what they should never do. For an example，don't fly a kite near electrical wires or play with fire-fighting equipments. While in school，never run up and down the stairs. In addition, clean windows without any means of protection is also dangerously. I hoped these tips will help they avoid danger.