◎ 题干
_____ teachers are at work now. Be quiet!
[     ]
A. All of        
B. All the            
C. All            
D. None of
◎ 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“_____ teachers are at work now. Be quiet![ ]A. All of B. All theC. All D. None of…”主要考查了你对  【定冠词(the)】【不定代词】  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。