2. Light as a feather with nothing in it, the strongest man can't hold it for more than a few minutes.
3. Fill an entire room with this, but it takes no space at all.
4. Keep adding this to a heavy barrel to make it lighter.
5. If you have it, you want to share it. If you share it, you don't have it. What is it?
6. To keep this, you need to first give it. What is it?
7. One of the questions that can never be answered with a "yes".
8. Which is correct to say, “The yolk of the egg are white?” or “The yolk of the egg is white?"
9. What do you fill with empty hands?
10. I look at you, you look at me, I raise my right, you raise your left. What is this object?