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				4．--Look.         dirty the water is!--Yes.we should really take some actions  to deal with it．A．what a        B．what         C．how         D．how a			【查看更多】
			


		
           
          


		
          
		
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          --Look，________ dirty the water is!
            
          --Yes，we should really take some actions to deal with it．
            
          A．what a         B．what         C．how          D．how a
          

			
          
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