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17. is no doubt  Tu Yoyo,the 2015Nobel Prize winner in Medicine,ever did so much on her way to success.(  )
A.It;whetherB.There;thatC.There;whetherD.There;if

分析 毫无疑问,屠呦呦,2015年诺贝尔医学奖的得主,在通向成功的路上付出了那么多.

解答 答案:B.
分析句子结构可知,本句考查句型there is no doubt that…,其中that引导的为一同位语从句,是对所修饰名词doubt的解释说明;故答案为B.

点评 本题考查同位语从句,注意区分其与定语从句,定语从句前面的名词即先行词在后面定语从句中需充当成分,而同位语从句是对前面名词的补充说明.

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