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It is believed that tea   1.    to Korea and Japan during the 6th and 7th centuries. In England, tea didn’t appear    2.    around 1660, but in less than 100 years, it had become the national drink. The tea trade from China to Western countries    3.    in the 19th century. This helped to spread the     4.  of the tea plant to more places around the world. Even though many people now     5.    tea culture, the Chinese are    6.   the ones who best understand the nature of tea.