Did you know that tea，the most popular drink in the world，was invented by accident？Many people believe that tea was first drunk about 5，000 years ago．It is said that a Chinese ruler called Shen Nong was the first to discover tea as a drink．One day，Shen Nong was boiling drinking water over an open fire．Some leaves from a tea plant fell into the water and remained there for some time．It produced a nice smell so he tasted the brown water．It was quite delicious，and so，one of the world's favorite drinks was invented．

A few thousand years later，Lu Yu，"the saint of tea"，mentioned Shen Nong in his book Cha Jing．The book describes how tea plants were grown and used to make tea．It also discusses where the finest tea leaves were produced and what kinds of water were used．From then on，the tea was getting more and more popular in the world．

56．When was tea first drunk？　　

57．In which country was tea drunk first？　　

58．What color was tea found first？　　

59．Who was"the saint of tea"？　　

60．What's main meaning of the first paragraph（段落）？　　．