◎ 题干
Jack wasn't saying anything but the teacher smiled at him ____ he had done something very clever.
  A as if       B in case       C while         D though
◎ 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“Jack wasn't saying anything but the teacher smiled at him ____ he had done something very clever.A as if B in case C while D though…”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。