Dear Bob
I have received your letter.Now,let me tell you something about being a fire figuter.
First of all,you should be healthy.You should have a strong body so that you can move fast.Secondly,you should be warm-hearted.That can make you be a good fire-fighter.Also,both carefulness and braveness are neccessary.You should not be afraid of fire and smoke.Then you should be fast and calm when emergency happens.Besides,to be a fire fighter is dangerous and easy to get hurt.
I hope youcan become a fire fighter one day
Yours
Jim