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。

One day, Dad and I was taking a walk by the lake while a boy rode by at a very high speed. Suddenly, we heard the loud scream. We turned around and saw the boy struggling in the lake, crying out help, Daddy and I ran towards him quickly and had pulled him out of the water. However, the boy rode away immediate without saying “Thank you”. I felt disappointing at his behavior. To my surprises, the boy came back with hot drinks and dry towels several minutes late. Seeing this, I knew I had misunderstood him and felt ashamed of me.