题目内容：

短文改错。

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 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.