Answer:
What falls down but is never injured?
What body part is pronounced as one letter but written with three, only two different letters are used?
What is always on its way but never arrives?
What is something yet nothing, but if you fill it up it will disappear?
What eight letter word has "kst" in middle, in the beginning and at the end?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?