Answer:
What is black when it's clean and white when it's dirty?
I start with āeā end with āeā. I have whole countries inside me. What am I?
I have two bodies joined together as one. When standing still, I run and run. What am I?
When you stop and look you can always see me. If you try to touch you cannot feel me. I cannot move but as you near me I will move away from you.
Brown I am and much admired. Many horses have I tried. Tire a horse and worry a man, tell me this riddle if you can. What am I?
What language does a billboard speak?