【題目】Some scientists believe that there is no _______ that the new medicine for cancer will be found. (  )

A. problem B. matter C. doubt D. question

【答案】C

【解析】考查名詞辨析。problem問題;matter事情;doubt疑問;question問題。句意:一些科學(xué)家相信——毫無疑問治療癌癥的新藥將被發(fā)現(xiàn)。故選C。

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