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作文。文中共有10处语言错误，每句中最多有两处。每处错误仅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。
I went hiking to a mountain with my friends last summer. It was a good trip at the beginning and something unexpected happened half way. One of my friend suddenly felt a terrible pain in his stomach and he couldn’t move any far. Nobody knew what to do it. One girl tried to call her mum in her mobile phone, but there was no signal in the mountain area. Lucky we had brought a tent with us. We put it up and let him rested in it. He took some medicine. Then he drink some water, and ate some food. After while, he felt much better and we walked on. We all enjoyed us on the top of the mountain.
something unexpected happened half way.One of my 
suddenly felt a terrible pain in his stomach and he couldn’t move any 
.Nobody knew what to do 
her mobile phone, but there was no signal in the mountain area.
we had brought a tent with us.We put it up and let him 
in it.He took some medicine.Then he 
some water,and ate some food.After
on the top of the mountain.