◎ 题干
Although it was not named _____ 1782, this kind of metal was used as early as 5300 BC.
[     ]
A. in
B. for
C. until
D. since
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Although it was not named _____ 1782, this kind of metal was used as early as 5300 BC. [ ]A. in B. forC. until D. since …”主要考查了你对  【介词和介词短语】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。