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【题目】Artemisinin (青蒿素) was first________ by Chinese scientist Tu Youyou in the 1970s.

A.inventedB.createdC.producedD.discovered

【答案】D

【解析】

句意:青蒿素于20世纪70年代被中国科学家屠呦呦首次发现。

考查动词。invented发明;created创造;produced生产;discovered发现。青蒿素是本身就存在,只是后来才被屠呦呦发现,用动词discovered。故选D

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