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．每处错误及其修改均仅限一词；
2．只允许修改10处，多者（从第11处起）不计分。
On May Day, some students from class Three. Grade One, went to a nursing home but did some meaningful work. Upon our arrival(一到…), they were warm welcomed, And then they started sweeping floor and cleaning the windows. Before finishing the task, they sit in the yard and chatted with the elderly people, When it were time for them to leaving, the elderly people thanked them for their kindness, They said it was so a beautiful and happy day that they would remember of it forever.
