新目标九年级英语unit6sectionB3a部分ppt：http://wenku.baidu.com/view/fead451dc281e53a5802fff8.html。
Unit9 Who invented tea? Did you know that tea, the most popular in the world (after water), was invented by accident? Although tea wasn't brought to the Western world until 1610, this beverage was discovered over three thousand years before that. According to an ancient Chinese legend, the emperor Shen Nong discovered tea when he was boiling drinking water over an open fire. Some leaves from a nearby bush fell into the water and remained there for some time. The emperor noticed that the leaves in the water produced a pleasant smell. Later he decided to taste the hot mixture. It was quite delicious. And in this way, one of the world's favorite drinks was invented.
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