Good Riddles

Question: In Tennis I'm zero, To Many I'm A Hero. What Am I?

Question: Hollow of water, tongue of wood, skin of stone, long I've stood. What am I?

Question: Where do burgers like to dance?

Question: What word is shorter when you add two letters to it?

Question: Shake me and I'll do what you want,
but first you have to pull me from the ground.
I'm on the tip of your tongue and over your shoulder.

What am I?