一篇很简单的英语作文帮我看一下有没有语法错误

一篇很简单的英语作文帮我看一下有没有语法错误
Last summer,I went on a camp in the mountains with my classmates.At around 7 o'clock in the evening,we told ghost stories next to our tents.Suddenly,Wang Jingjing said,"Listen!I heard something unusual!"We stopped to listen but heard nothing."That's a UFO!"Gong Ying shouted.We looked up.A big bright thing soon landed near us.Two aliens got out of the UFO."What should we do?"Huang Yaxi asked."I'm afraid."Lan Chenxi said lowly.We all stood there with our eyes wide open.Then I didn't know what happened.We fell asleep.When we wake up,we were at school.
This story is my imagination.If it is similar to have,be sheer the coincidence.Thank you.