文中共有10处语言错误，每句中最多有两处错误。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。
A discussion about hiking has held in our class. Some students think that hiking during vacations can make people to feel healthier, fresher and more harmonious with nature. They
find themselves deep attracted by the beauty of nature. They can also be relaxing while they
are walking in deep mountains. But nowadays some hikers even begin to explore the places
that people has never been to, and accidents have been happened now and then because poor knowledge of hiking. Some hikers even lost their life. The other students in our class think it
not safe to organize so dangerous activities. They make suggestions which laws should be
passed and hikers should be trained before they attend the activities.