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				 Be quiet, please. The students          a class now. A. have         B.  had        C. are having     D.  were having			【查看更多】
			


		
     
    


		
    
		
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    Be quiet, please. The students _______ a class now.              
    

    [     ]
    

    A. have               
    B. had              
    C. are having          
    D. were having
    

			
    
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    Be quiet, please. The students  _______  a class now.             
    

    [     ]
    A. have      
    B. had     
    C. are having
    D. were having 
    

			
    
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