假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下便条。便条中共有10处错误，每句中最多有两处。错误涉及一个单词的增加，删除或修改。
增加：在缺词处加一个漏词符号（ ），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。
A discussion about hiking had been held in our class. Some students think that hiking during vacations can make people feel healthier, fresher or more harmonious with the nature. They find themselves deep attracted by the beauty of nature. They can also be relaxing by walking in deep mountains. But nowadays some hikers even begin to explore  the places people have ever been to, and accidents have happened now and then because poor knowledge of hiking. Some hikers even lost their life. The other students in our class think not safe to organize such dangerous activities. They make suggestions which laws should be passed and hikers should be trained before they attend the activities.