◎ 题干
---What did our teacher do?
---He raised his arm as a(n)        for us to stop.
A.signal B.advice
C.evidence D.design
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“ ---What did our teacher do?---He raised his arm as a(n)for us to stop.A.signalB.adviceC.evidenceD.design…”主要考查了你对  【可数名词及其单复数】【集合名词】【名词】  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。