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。
Recently, our school has held the meaningful discussion on whether it is necessary for middle school students to have classes on weekends. Some of our classmates believe we should have classes on weekends, because we can make fully use of the free time to review the lessons we had learnt. Some others are against the opinion, saying we had better to have a good rest on weekends so that we can work effective during the weekdays. The rest agree with neither of the opinion. Keep the balance between work and play are both important for us. They suggest one day of the weekend should used to learn our lessons and during the other day we do something interested or have a rest.
