Answer:
What has many keys, but can't even open a single door?
What is used to greet, and also used to describe something taller than you?
There is an ancient invention. Still used in some parts of the world today. That allows people to see through walls.
If I say "everything I tell you is a lie", am I telling you the truth or a lie?
Out of all the celestial bodies, this one has the funniest name
Why was the cook arrested?