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				 Mr.  Black        us English since he came here in 1990.   A. is teaching     B.  taught              C.  teaches       D.  has taught			【查看更多】
			


		
           
          


		
          
		
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          Mr．Black ________ us English since he came here in 1990
          

          

          [　　]
          

          A．is teaching
          

          

          B．taught
          

          

          C．teaches
          

          

          D．has taught
          

          

          

			
          
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