Answer:
I'm tall when I'm young and I'm short when I'm old. What am I?
I am an instrument capable of making numerous sounds but cannot be touched or seen. What am I?
My teeth are sharp my back is straight to cut things up it is my fate.
I am tomorrow's yesterday and yesterday's tomorrow. What am I?
I fill a room but take no space. What am I?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?