1. What bank has no money?
2. What falls often but never gets hurt?
3. What can go around the earth without rockets?
4. What is the end of everything?
5. What goes up and never comes down?
6. What is yours, but is used more by others than by you?
7. How many sides does a house have? (来源：英语学习门户 http://www.EnglishCN.com)

Keys

1.the riverbank
2.snow
3.the moon
4.the letter 'g'
5.your age
6.your name
7.two-inside and outside