Answer:
I am expelled from you orally with a sound
I am a protector. I sit on a bridge. One person can see right through me, while others wonder what I hide. What am I?
The more you work, the more I'll eat.You keep me full, I'll keep you neat. What am I?
Tear me off and scratch my head, what once was red is black instead. What am I?
You may enter, but you may not come in. I have space, but no room, I have keys, but open no lock. What am I?
Why was the cook arrested?