I went hiking to a mountain with my friends last summer. It was a good trip at the beginning but something unexpected happened on the half way. One of my friends suddenly felt a terrible pain in his stomach and he couldn't move any rther. Nobody knew what to do. One girl tried to call her mum with her mobile phone but there was no signal in the mountain area. Luckily we brought a tent with us. We put it up and let him rest in it. He took some medicine. Then he drank some water, and ate some food. After a while, he felt much better and we walked on. We all enjoyed ourselves on the top of the mountain.（绿叶鸟网）
