Scientists are making huge strides in battling one of the top three killer diseases in the world: cancer.

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问题 Scientists are making huge strides in battling one of the top three killer diseases in the world: cancer.

选项 A、progress
B、siege
C、retrospect
D、secretion

答案A

解析 科学家在与癌症的斗争中取得了重大进展。而癌症是世界三大致命疾病之一。A项progress “n. 进步,进展”。B项siege “n. 围攻,包围”。C项retrospect “n. 回顾”。D项secretion “n. 分泌;分泌物”。注:题干中make huge strides in意为“在……方面取得重大进展”,故正确答案为A项。
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