趣味謎語
1. What animal is big when it’s first letter is upside down?
2. If two letters are added to a word, the word will become shorter. What is the word?
3. Which two words have thousands of letters in them?
4. Mr. Brown has four children. Each son has a sister. How many children does Mr. Brown have?
5. What is black when it is clean and white when it is dirty?
謎底：1.pig 2.short 3.post office 4.five 5.A blackboard
