Answer:
They have not flesh, nor feathers, nor scales, nor bone. Yet they have fingers and thumbs of their own. What are they?
I am black when I am clean and white when I am dirty?
When I live I cry, If you don't kill me I'll die.
Where do you go in through one hole and come out through two holes at the same time?
What English word retains the same pronunciation, even after you take away four of its five letters?
The more of me you take, the more I appear behind you. What am I?