Answer:
I have no voice but I can teach you all there is to know. I have spines and hinges but I am not a door. Once I’ve told you all I cannot tell you more.
The more you work the more I'll eat.You keep me full I'll keep you neat.
With a halo of water and a tongue of wood, stone as skin long I stood. What am I?
I have a neck and no head, two arms but no hands. I'm with you to school, I'm with you to work. What am I?
I have a lot to say but can't be heard because I can't speak one single word. What am I?
Give it food and it will live, give it water and it will die.