Answer:
What gets sharper the more you use it?
What is it that after you take away the whole some still remains?
I have two eyes in the front and a lot of eyes on my tail
What can fill a room but takes up no space?
What goes through a door but never goes in and never comes out?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?