◎ 题干
—Look! The telephone is broken. Someone damaged it         purpose.  
—That may be right. But perhaps it was broken         accident.  
[     ]
A. on; by    
B. by; by    
C. on; on    
D. 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 it purpose.—That may be right. But perhaps it was broken accident.[ ]A. on; by B. by; byC. on; on D. b…”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。