_____ teachers are at work now. Be quiet!

A. All of        
B. All the            
C. All            
D. None of
B
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科目：小學英語 來源：黑龍江省小考真題 題型：單選題

_____ teachers are at work now. Be quiet!
[     ]
A. All of        
B. All the            
C. All            
D. None of

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