◎ 题干
It was ____ the old worker came that we ____ the  experiment.
A.until; didn’t beginB.not until; began
C.until; beganD.not until; didn’t begin
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“It was ____ the old worker came that we ____ the experiment.A.until; didn’t beginB.not until; beganC.until; beganD.not until; didn’t begin…”主要考查了你对  【状语从句】【限制性定语从句】【主语从句】【同位语从句】  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。