◎ 题干
_____ the people have become masters of their country _____ science can really serve the people.

A. It is only then; that
B. It was that; when
C. It is only when; that
D. It was when; then
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“_____ the people have become masters of their country _____ science can really serve the people. [] A. It is only then; that B. It was that; when C. It is …”主要考查了你对  【从属连词】【强调句】  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。