Funny Riddles

Question: What is the only question you can't answer yes to?

Question: Railroad crossing without any cars. Can you spell that without any R's?

Question: A truck driver is going opposite traffic on a one-way street. A police officer sees him but doesn't stop him.Why didn't the police officer stop him?

Question: 100 feet in the air, yet its back is on the ground.

What is it?

Question: A king, queen, and two twins all lay in a large room.

How are there no adults in the room?