Good Riddles

Question: what does 1+1=.

Question: What am I ?

Question: A semi truck weighing exactly 10,000 pounds gets onto a bridge that is 100 miles long. The bridge's weight limit is exactly 10,000 pounds, any more will break the bridge. After going about 80 miles down the bridge a small bird lands on the truck.

What happens?

Question: What did the leaves say to the autumn wind?

Question: The more it dries, the wetter it becomes.

What is it?