Answer:
What water can you eat and chew?
I have one, you have one. If you remove the first letter, a bit remains. If you remove the second, bit still remains. If you remove the third, it still remains.
What do spies where on there feet?
What do frogs order when they go to a restaurant?
What is used to greet, and also used to describe something taller than you?
Why was the cook arrested?