Answer:
I fill a room but take no space. What am I?
Without me everyone would lose their head.
I have two eyes in the front and a lot of eyes on my tail
I repeat only the last word you say. The more I repeat, the softer I got. I cannot be seen but can be heard. What am I?
From house to house I go, sometimes narrow, sometimes wide. Whether there's rain or snow, I always stay outside. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.