听力原文：

B: Do you know when April Fool’s Day is?

G: It’s April 1st. It is celebrated in different countries around the world.

B: What do people usually do on April Fool’s Day? 

G: People usually play all kinds of tricks on each other.

B: Now many April Fool’s jokes have become business advertisement.

G: I don’t understand. Could you give me an example?

B: Last April Fool’s Day, an English reporter announced that scientists had recently discovered a special kind of food. Kids would get taller in a short time after eating it. Many people waited in line to buy it. By the end of that day, more than 20,000 people had bought it. 

G: Were they fooled?

B: Yes. They were fooled, but by the time people realized the story was a hoax, the food had been sold out.

答案： 1. A