用festival,forest,grassland,mountain,jungles,desert,hill这些单词造句

there are many festivals in every single country no matter how big or small it is!
It is very dangerous to be alone in a forest!
We can have a picnic on the grassland this Sunday afternoon if you 'd like to.
Water goes around the mountains.
I've never seen jungles though I want to see them very much!
Ihere must be qulte a lot sands to make up a desert!
You can always see some fake hills in the parks here.