文中共有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∧，并在此符号下面写出该加的词。
删除：把多余的词用斜线＼划掉。
修改：在错词下面划一横线，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处不计分。
Hiking has become popular in China during recent years, and more and more people become hikers, that are called Donkey Friends (驴友) in Chinese. A discussion about hiking has held in our class. Some students think that hiking during vacation 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 walking in deep mountains. But nowadays some hikers even begin to explore the places people have never gone 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 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