用第一人称写一篇为“A happy trip”的英语短文 （过去式）

A happy trip
I went to the Wst Mountian with my good friends last Sunday,.When we got near the West Mountain by bus,we were very exicited.We planned to walk to the top of the West Mountain.So we got to the mountian on foot.There were many green trees and the air is very fresh on the mountian.At last we reached the top.We had a picnic there,we took lots of pictures there,too.Then we went home.Though we were very tired,we were very happy.