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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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