Answer:
Always in you, sometimes on you. If I surround you, I can kill you. What am I?
I walk on 4 legs in the morning 2 legs at noon and 3 legs at night.
What is seen in the middle of March and April that cannot be seen at the beginning or end of either month?
I'm where yesterday follows today and tomorrow is in the middle. What am I?
I am a box which holds keys but not locks. With the right combination, I may unlock your soul. What am I?
Why was the cook arrested?