◎ 题干
—Look! The telephone is broken. Someone damaged it       purpose.
—That may be right. But perhaps it was broken       accident.
A.on; byB.by; byC.on; onD.by; on
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“—Look! The telephone is broken. Someone damaged itpurpose.—That may be right. But perhaps it was brokenaccident.A.on; byB.by; byC.on; onD.by; on…”主要考查了你对  【介词和介词短语】  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。