The story of quinine（奎寧）

Have you ever heard of quinine? It is one of many famous medicines discovered in the Amazon rainforest._____60____.

Quinine is used to cure malaria, a very dangerous 'disease' that is spread by mosquitoes. It is made from the bark（樹皮） of the Chinchona tree. The tree is named after the Countess of Chinchona from Peru. In 1630 she was very sick with malaria and had a high fever. _____61____.  .

People in Europe heard about this medicine and then came to the rainforest to collect the plant. It was first called quinine in 1820 by two French scientists, Mr. Pelletier and Mr. Caventou. _____62____ .

For almost three hundred years quinine was used to cure malaria as well as many other dangerous illnesses. In 1944 scientists made the first artificial（人造）quinine. _____63____ because many kinds of malaria cannot be cured using modern drugs anymore.

So remember, we must protect our rainforests because maybe other important medicines will be found.

60．A    61．B    62．E    63．C

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