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          — How do you like your Englsh teacher? 
          — He is great. We         friends since three years ago.
          A．wereB．have madeC．have beenD．have become
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          C
          現(xiàn)在完成時(shí)態(tài)的用法。由答句中的since three years ago知，主語用現(xiàn)在完成時(shí)態(tài)，且動(dòng)詞用延續(xù)性動(dòng)詞，因此選C。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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