please check an correct me. Thanks

Apostrophes to shorten Practice

It is a beautiful sunny day.
It’s a beautiful sunny day.

He is going to regret stealing the money from his brother.
He’s going to regret stealing the money from his brother.

They are the best friends in the world.
They’re the best friends in the world.

The dinner is ready.
The dinner’s ready.

I am the fastest sprinter in my entire school.
I'm the fastest sprinter in my entire school.