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          Today E-mails ________ in both cities and countryside because they are much faster and cheaper than letters．
            
          A．are used          B．are using          C．were used              D．were using
            
            
         
        
         			
          

			
          
				
          
		
		
	
          
		
          
			
          
				
          
				  
            
          1、A
            
            				
          
			
          
			
          
				
          
			
          
			
          
				
          
			
          
			
          
				
          
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          Today E-mails ________ in both cities and countryside because they are much faster and cheaper than letters．
            
          A．a(chǎn)re used          B．a(chǎn)re using          C．were used              D．were using
          

			
          
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