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【题目】Professor Tu Youyou never stops doing research on Chinese medicine, ______?

A. is she B. does she C. isn’t she D. doesn’t she

【答案】B

【解析】

试题分析:句意:屠呦呦教授从来也没有停止对中药的研究,是吗?这是一个反义疑问句。在反义疑问句中,当陈述部分是肯定的,疑问部分用否定式;反之,则用肯定式。由句中的never可知,前半部分陈述是否定意义,后面的反义问句应该用肯定式,不能出现not,可排除C/D。同时,屠呦呦是单数人称,stop是实意动词,所以助动词用does,可排除A。故选B。

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