Answer:
You will find me with four legs, but no hair. People ride me for hours, but I don't go anywhere without needing to be tugged. Jerked or turned on, I always manage to be ready for work.
You heart it speak, for it has a hard tongue. But it cannot breathe, for it has not a lung.
What has two spines and a lot of ribs, and carries much but never moves?
There is a puzzle which can be asked all day with a different correct answer each time. What is the puzzle?
What is lighter than what it is made of?
What language does a billboard speak?