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    精英家教网 > 高中英语 > 题目详情
    ______ 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
    C
    此题是一个强调句型，强调的是时间状语从句，强调句的结构为it is/was + 被强调的部分 + that,句意：只有当人们已经了解了他们的国家的时候科学才真正的为人民服务，所以选C。
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