【题目】Scientists are hoping for a ____________ in the search for a cure for cancer.
A. reputationB. breakthrough
C. civilizationD. sensation
在线课程【答案】B
【解析】
考查名词辨析。句意：科学家希望在抗癌研究上能有突破。A. reputation名声，名誉；B. breakthrough突破，突破性进展；C. civilization 文明，文化；D. sensation感觉，轰动。故选B。