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：把多余的词用斜钱（\）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).只充许修改10处，多者（从第11处起）不计分。
Dear Diana,
Thank you for the lovely day we have with you. It was so kind tor you to let us bring Anne's friend. Gina. Unfortunate, the only problem was the journey home. There had been a terrible accident on the highway and, for a result, there was a long line of traffic for at least six mile. In the end, we drove to a service station and waited there unless the road was clear. In the car park Gina nearly got knocked over as a car drove out far too quickly from behind a lorry. They finally dropped Gina off at her parents' and made our own way to home.
