Answer:
What has keys but no locks a space but no room and you can enter but can't go in?
What always goes to bed with its shoes on?
Lovely and round, I shine with pale light. Grown in the darkness, a lady's delight. What am I?
My second is performed by my first. A thief by the marks of my whole might be caught. What am I?
What gets whiter the dirtier it gets?
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.