A map.

　　2. What can be measured but has no length， width or thickness？

　　The temperature.

　　3. What makes the Tower of Pisa lean？

　　It never eats.

　　4. Why is writing called handwriting？

　　If people wrote with their feet， we would have to call it footwriting.

　　5. If there were only thre girls in the world， what do you think they would do？

　　Two of them would get together ans talk about the other one.

　　6. How many great men have been born in London？

　　None. Only babies.

　　7. When can you have an empty pocket and still have something in it？

　　When you have a hole in your pocket.

　　8. The greater it is， the less it can be seen. What is it？

　　Darkness.

　　9. The more you take away， the bigger I become. What am I？

　　A hole.

　　10. Who may marry many a wife and stay single all of his life？

　　A priest.（牧师）