求改一下这篇英语短文.
Lastsummerholiday,Itakeavacationwithmyparents.Wewenttothenaturalparkandsawmanykindsofanimalsinthepark.Therearetigers,monkeys,pandas,lionsandbears.Buttherearealotofgarbage,sotheyseemsnothappy.Theirlifeinthenaturalpark,peopleshouldnotdestroytheirhome.Iwillneverforgetthetirptothenaturalpark.
错的地方说明一下、