麻烦帮我看一下这篇文章有什么语法错误,并改正

题目

麻烦帮我看一下这篇文章有什么语法错误,并改正
谢谢!急用!
A visit to Kunming
Last holiday,I went to Kunming with my parents.I think Kunmjing is a good place to have fun.
We took the car to Kunming.Kunming's streets were very croded.And there were many policemans.Firstli,we visited my uncl and aunt.But because the roads were too crowded,we used twenty minutes to acrossed the srteets.
When we got to them hourse,we were so tired,so we didn't visit any place.But we had a very good dinner.It was delicious.My aunt was a good wife!
In the second day,we visited the Gree Lake.It was really great!There were may gulls,they were beautiful.And we by the small boat to visited the lake.The water was clean.
Then,we went to the Expo Park.There had lots of things,they were intresting!It was very beautiful,and it was very famous in Yunnan.
We were very sad that we can't stay here for a long time,but I were very happy can came to here!

答案

Please institute the following changes:1.Kunming's streets were very crowded.2.There were many policemen (on the streets perhaps?)3.Firstly4.Uncle and aunt.5.Since the roads were very crowded,it took ...