题目内容：

下面短文中有10处语言错误。请在有错误的地方增加、删除或修改某个单词。

增加：在缺词处加一个漏字符号（∧），并在其下面写上该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写上修改后的词。

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。

Last Sunday I was walking to the Green Lake Park while I met a foreign visitor who seemed to be losting. I tried to help him but I found we had troubles in understanding  each other because my poor English. Just at that moment, a young lady came to help. She spoke well English. The foreigner was unable to find the way with her help, and I learned some English, either. Before the foreigner left, he said he was thankful for their kindness. It was at that time that I decide to work harder at English. This experience has been made me realize that English is really useful.