Researcherssaytheyhaveachievedamajor

问题详情：

 Researchers say they have achieved a major_______in cancer treatment, which brings hope to cancer patients.

A. advantage          B. reputation

C. breakthrough       D. assumption

【回答】

 【解析】选C。句意：研究者们说他们在癌症治疗方面取得了很大的突破，给癌症病人带来了希望。breakthrough意为“突破”，符合语境。advantage优势；reputation名声；assumption设想。

知识点：名词

题型：选择题