April Fool's Day started in the sixteenth century in Europe. Before that time, New Year's Day was celebrated on April 1st. Then a new calendar was introduced called the Gregorian calendar. January 1st became the first day of the year, but many people did not know about it. So those who continued to celebrate New Year's Day on April 1st were teased. They were called fools. Nowadays we play jokes on people on April 1st. For example, someone might put salt in the sugar container so another person could "accidentally" put it in their coffee. Or someone might change the time on another person's alarm clock so that person would unknowingly wake up earlier or later than planned. Or maybe a person would tell a lie to make someone else shocked. After we play the trick, we say "April Fool." Then the poor person realizes he was fooled. It is generally done in the spirit of fun and doesn't cause any real harm to anyone. Do you have any great jokes to play on anyone today? Try it out. Just don't forget to say "April Fool" when the other person begins looking a little confused. Question 27: Where did April Fool's Day first appear? A. Australia B. Asia C. Africa D. Europe Question 28: When was Gregorian calendar introduced? A. In 1916 B. In 1600s C. sixteen centuries ago D. In 1500s Question 29: What does 'trick' in the 3rd paragraph means? A. An important document B. An illusion C. A mischievous practical joke D. A clever or particular way of doing something Question 30: How can people realize that they are tricked? A. They are called 'April Fool'. B. They wake up earlier. C. They are confused. D. They put the salt in their coffee.