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          My cousin has been learning English _____she was six years old.
          A．whenB．sinceC．untilD．because
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B
          since是從…來的意思，經(jīng)常在完成時(shí)中
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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