Answer:
I am one with eight to spare, lest I lose my one. I'm not a number. What am I?
I am a king who's good at measuring stuff. 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?
Good memory, skin like the sea. A great beast I am, yet vermin frightens me. What am I?
What is so delicate that saying its name breaks it?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.