проверьте пожалуйста!!!
Dear Nastya,
I hope you are well. The expedition was amasing. I think you won't believe what I saw today. While we had passed through some bushes and trees, Professor Summerlee saw a giant footprint. Then we saw five of the most extraordinary creatures, two adults and three young animals. They had slate-coloured. I couldn't believe my eyes because I have never seen it in my life. We stayed and saw very long time. They were as tall as trees and seemed to have the strength of several elephants. We saw the shimmering grey gleam of their skin and their heads moving up and down high above the tree tops. Then they dissapeared from our sight I'll tell you more when I get back.

The expedition was amasing. Думаю последнее слово было написано с ошибкой, правильно будет The expedition was amazing.