Проверьте ошибки, lived a swan who loved to soar in the sky. he couldn`t imagine his life without a flight. just imagine what kind of view opens. you can see rivers, large fields with flowers, deep blue seas. but once the poacher let off a gun to him in the wing. the swan could fly anymore. he became weaker and weaker every day. raven decided to conclude a dispute on the white wing of a swan. by the car you can come unstick, claimed the raven. trustful swan agreed to arrange a race. many birds thought that gambling on street races is a waste of time. but how many of them have actually witnessed a race? the combination of all the cars racing, the smell of the smoking tires in the burn out lane, and the adrenaline that flows through your body as the cars line up.

Правильный вариант:
Once upon a time a swan who loved to soar in the sky lived. It couldn`t imagine his life without a flight. Just imagine such a beautiful view opens. You can see rivers, large fields with flowers, deep blue seas. But once a poacher shoot it in the wing. The swan couldn't fly any more. He became weaker and weaker every day. A raven decided to conclude a dispute on the white wing of the swan. By the car you can come unstick, claimed the raven. Trustful swan agreed to arrange a race. Many birds thought that gambling on street races is a waste of time. But how many of them have actually witnessed a race? The combination of all cars racing, the smell of the smoking tires in the burn out lane, and the adrenaline that flows through your body as the cars line up.

Удачи в учёбе!

Once upon a time there lived a swan who loved to soar in the sky.
Just imagine what kind of view is opened. 
But once, the poacher let off the swan wing with gun.
The swan couldn't fly anymore.
Raven decided to conclude a dispute on the swan's white wing.
"You can unstick by the car !", claimed the raven.
P.S. наверное это не совсем то , что требовалось ...
       есть пара, всего лишь ошибок. А остальное  просто мой вариант