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【題目】Scientists are hoping for a ____________ in the search for a cure for cancer.

A. reputationB. breakthrough

C. civilizationD. sensation

【答案】B

【解析】

考查名詞辨析。句意：科學家希望在抗癌研究上能有突破。A. reputation名聲，名譽；B. breakthrough突破，突破性進展；C. civilization 文明，文化；D. sensation感覺，轟動。故選B。

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