◎ 题干
Be careful! You are _____  the cliff (悬崖).
[     ]
A. on the side of        
B. on the edge of
C. in the middle of      
D. in the edge of
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Be careful! You are _____the cliff (悬崖).[ ]A. on the side of B. on the edge ofC. in the middle of D. in the edge of…”主要考查了你对  【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。