Answer:
What's made of water but if you put it into water it will die?
I don't live within a house, nor do I live without. Most will use me when they come in, and again when they go out. What am I?
You will always find me in the past. I can be created in the present, but the future can never taint me. What am I?
What always ends everything?
I go around in circles, but always straight ahead. Never complain, no matter where I am led. What am I?
What never gets any wetter no matter how hard it rains?