此题要求改正所给短文的错误。对标有题号的每一行做出判断：
如无错误，在该行右边横线上划一个勾（√）；如有错误（每行只有一个错误），则按下列情况改正：
该行多一个词：把多余的词用斜线（\）划掉，在该行右边横线上写出该词，并也用斜线划掉。
该行缺一个词：在缺词处加一个漏字符号（∧），在该行右边横线上写出该加的词。
该行错一个词：在错的词下划一横线，在该行右边横线上写出改正后的词。
注意：原行没有错误的不要改。
Last Sunday I am walking to the Greet Lake Park when        ________
I met foreign visitor who seemed to be lost. I tried to help        _____
him, but I found we had difficulty in understand each other       ______
because of my poorly English . Just at that moment ,            ______
a tall young lady came to our help. He spoke very good English.   _______
With her help, the foreigner finally found the way but           ____
I learned some English as well. After he left, the foreigner        ____
thanked to us for our kindness. I was very excited that day.       ______
This experience have made me realize that English is really       _____
useful and worth learning .I will work harder at it.              ______