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（从第11处起）不计分.

You may have heard story about old people blackmailing (敲诈) those who offer help to them when they fell over. Therefore, I don’t think it’s often the case. On my way to home yesterday, I was about to cross a street when an old granny walked beside me suddenly fell onto the ground. I was trying to help him when someone said, “Better take a picture of scene first, just in case…” I knew that he meant. But without hesitation, I still helped and stayed with her until her son showed off. Happily, both of them were so gratefully to me.