增加：在缺词处加一个漏词符号(∧)，并在此符号下面写出该加的词。
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。
Last Sunday, Li Ming and his classmates went to the park near the school. Can you guess that they did there? They take part in a volunteer activity. They reached in the park at nine o'clock and then they divided into three groups. Li Ming was in Group Three. All group had different tasks. Group One planted trees. Group Two picked up rubbish leaving by the tourists and cleaned benches. A group that Li Ming was in wiped all the equipment in the Children's House. All of them worked hardly. Before noon, we finished working. Each of them felt a little tired, and they were happy because they had done a good deed.
