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				 Do you know when basketball    ?    A. is  invented    B. was invented    C. has invented     D. had invented			【查看更多】
			


		
           
          


		
          
		
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          Do you know when basketball             ?      
          

          [     ]
          A. is invented       
          B. was invented   
          C. has invented    
          D. had invented
          

			
          
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          Do you know when basketball ______? 
          

          [     ]
          A. is invented 
          B. was invented
           C. has invented
           D. had invented 
          

			
          
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          Do you know when basketball ________?
          

          

          [　　]
          

          A．is invented
          

          

          B．was invented
          

          

          C．has invented
          

          

          D．had invented
          

          

          

			
          
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