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。
My mom is a volunteer in a public hospital. She serve dinner every day to the people waiting for their relatives outside hospital. One day, she asked me to help her of volunteering. At first, I didn't want to, and in the end I gave in to her. Certain, I went there unwillingly. The much food we gave, the more people would come. Looking at people's smiles, especially those from children, was amazed! That made me to feel glad for being there. I realized that happy is not only about receiving, but giving as well. Since then, I had kept volunteering every week.
