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ruler, boil, smell, national, fridge, low, translate, lock, earthquake, biscuit, cookie, instrument, remain, trade, doubt, somebody, ring, bell, sudden, musical

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by accident,  without doubt,  all of a sudden,  fall into,  less than,  not…until, 

take place,  drop into

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1.How was tea invented£¿

2.The tea trade from China to Western countries took place in the 19th century.

3.It is said that a Chinese ruler called Shen Nong was the first to discover tea as a drink.