◎ 题干
______ people have become masters of their country ____ science can really serve the people.
A.It is only then ;thatB.It is that;when
C.It is only when; thatD.It is when;when
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“______ people have become masters of their country ____ science can really serve the people.A.It is only then ;thatB.It is that;whenC.It is only when; thatD.…”主要考查了你对  【therebe句型】  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。