◎ 题干
_______the people have become masters of their country _______ science can really serve the people.
A.It is only then; thatB.It was that; when
C.It is only when; thatD.It was when; then
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“_______the people have become masters of their country _______ science can really serve the people. A.It is only then; thatB.It was that; whenC.It is only whe…”主要考查了你对  【并列连词】【从属连词】  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。