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．

We are required to collect our smart phones and keep it in the teacher's during the weekdays．In fact the most of us obey this regulation，but some still play various trick against it．I'm among those．Once，I hand in a waste phone． Mr．Li，our head teacher，seemed ignore all that．So I felt very luckily to have an extra phone with me．And good times don't last long．"Can I use your phone as a while？I forgot to take mine by chance．"Mr．Li said，pick out my waste phone and dialing．You can see how embarrassing I was at the scene!