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。
I went to the Summer Palace on last week. At the gate I happened to meet some American tourists. I greeted him in English and then we began to chat. I got to know that they were college students travel in China. I proud introduced some famous places to them. They were busy taking picture and were impressed with the amazed changes of China in the past few years. After that, we go boating on a lake and had good time. We exchanged our email addresses so that we could write to each other in the future. They thanked me again and again and said they would never forget the time when we spent together. I was very glad to have a chance to practising my oral English.
