増加：在缺词处加一个语字符号（∧），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。
Our school witnessed quite a few changes in the past few years. There used to have a playground on one side of the main road. And now what you can see is a new office building, where our teachers prepare for their lessons. On the other side stand another building — our library. Most of the students like to study in the library, main because the atmosphere in them is suitable for learning. Another reason is because we can get plenty of useful informations from various learning materials. Much to my pleased, our school becomes more beautiful than ever before.
