增加：在缺词处加一个漏字符号(N)，并在其下面写出该加的词。
删除：把多余的词用斜线(\)画掉。
修改：在错的词下画横线，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。
We spend much time at school. Our school is like beautiful garden. We students are like flowers planting in it and our teachers are like gardeners, that take good care of us and water us with love and knowledge. In my opinion, it's their duty to do something for our school. First, we should protect the school environment so dropping litter careless should be forbidden. Meanwhile, we can plant more tree. Next, we shouldn't waste water, food, electricity and so on. However, we should remember to turn on the taps and reuse water. Last, it was necessary to get on well with others. When someone is in trouble, we had better to give him a hand and help him out.
