Many people don't start a day without a cup of jye.ai.Coffee is popular all over the world.
   Coffee is a cold or hot drink made from coffee beans.Coffee beans are not really beans but berries from the coffee tree bush.There are at least 60 types of coffee trees in the world.The coffee tree needs warm climate.More than 10 billion （十億） coffee trees are grown all over the world.
   There are different types of coffee drinks.Black coffee is coffee with no milk in it.Espresso is very strong coffee.Cappuccino is espresso with milk.Latte is made like a cappuccino but with more milk and a very thin layer of foam（泡沫）.
   Coffee has a long history.No one knows exactly how or when coffee was discovered（被發(fā)現(xiàn)）.A legend （傳說） said that，before about 1400，a shepherd （牧羊人） named Kaldi noticed that his sheep seemed more energetic（精力充沛的）after eating some berries，and some of them even didn't want to sleep at night.Then，people made a tea of these beans and found it could help people stay up late.
   Drinking coffee brings some advantages for people.The caffeine （咖啡因） can make people feel energetic and less tired.That's why some people drink coffee when they are studying or working.Also，it acts on the brain to improve memory.However，drinking coffee in the evening makes it difficult for some people to fall asleep.Also，too much caffeine is dangerous for kids.
   Next time you feel tired during the day，try a cup of coffee!But always remember not to drink too much.
（1）Are coffee beans really beans？

No，they aren't.

No，they aren't.

（2）According to the legend，when was coffee discovered？

Before about 1400.

Before about 1400.

（3）Why do some people drink coffee when they are studying or working？

Because the caffeine can make people feel energetic and less tired.

Because the caffeine can make people feel energetic and less tired.

（4）What does the passage mainly talk about？

Coffee.

Coffee.