1. Why do we all go to bed at night?
2. What can you break without touching it?
3. What is it that we never borrow but often return?
4. How long is a shoe?
5. What never asks any questions but always gets answers?
6. When can water be held in a basket ?
7. What can only be used after they have been broken?
8. What is always before you, yet you can't see it?
9. If you want to get rich, why should you keep your mouth shut?
10. What is the best and cheapest light?
Keys:
1． Because the bed won＇t come to us．
2． Promise．
3． Thanks．
4． One foot long．
5． A doorbell．
6． When it becomes ice．
7． Eggs．
8． Future．
9． Because silence is gold．
10． Daylight．