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：在错的词下画一横线，并在该词下面写出修改后的词。
注意： 1）每处错误及其修改仅限一词；
2）只允许修改10处，多者（从第11处起）不计分。
A shop owner told me a story, that moved people in the neighborhood deep. One day, a hungry homeless dog came and the owner gave it up some food to eat. To his surprise, it comes to his shop whenever he opens a door. The owner has gradually realized that it doesn't come for food and repays him. Every day, it sits besides the goods outside the shop and acts for a guide. When customer come near, it barks to remind the owner come out to serve them. Thus, the dog had found a home and the owner had a faithful employee.
