Answer:
I am the place where yesterday is always before today. What am I?
Die without me, never thank me. Walk right through me, never feel me. Always watching, never speaking. Always lurking, never seen. What am I?
I have two bodies joined together as one. When standing still, I run and run. What am I?
What is at the end of a rainbow?
What can fill a room but takes up no space?
No matter how little or how much you use me, you change me every month.