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 have two foreign friends, Kari and Vance, which come from the USA. Now they were teaching English in a university in Nanjing. Last year they paid the visit to our school. I had never meet any foreigners before. Besides, I was eagerly to know how I was getting on my spoken English, so I went over to talk with them. All of them were surprising a school student could speak English. And they suggested to taking a photo together. Since then we have been good friends and now we write English letter to each other often.
