Answer:
I am what remains when nothing is left.What am I?
Runs smoother than any rhyme, loves to fall but cannot climb.
As a whole, I am both safe and secure. Behead me, I become a place of meeting. Behead me again, I am the partner of ready. Restore me, I become the domain of beasts.
What has two legs but doesn't walk?
This is needed both for courage and hardcover books.
When is it bad luck to see a black cat?