短文改错。
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。
I went to Shanghai Expo on last week. At the gate I happened to meet some America tourists. I greeted
him in English and then we began to chat. I got to know that they were college students travel in China.
They were busy with taking pictures and were much impressed with the changes had taken place in the
past few years. After which, we visited China Pavilion and had a good time. We exchanged our email address
so that we could write to each other on the future. They thanked me again and again. I was very glad to have
a chance to practising my oral English.
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