Answer:
What goes with a car, comes with a car, is no use to a car but a car cannot move without it?
Who is that with a neck and no head, two arms and no hands? What is it?
What do you fill with empty hands?
What begins and has no end? What is the ending of all that begins?
If you have it, you want to share it. If you share it, you don't have it.
What is so fragile that saying its name breaks it?