Riddles

1. A is the father of B. But B is not the son of A. Why?
2. Name the building which has 1000 stories.
3. I have holes on my body, but still, I can carry water. Who am I?
4. Two boxers are playing a boxing match. The match has 12 rounds. But, they could play only 6 rounds in which none of the two could hit each other. Why?
5. Why did the banana go to the doctor?
6. In a running race, what does the winning runner lose?
7. What do you call a fairy that hasn't taken a bath?
8. What is the best month for a parade?
9. What two words have thousands of letters in them?