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          The railway was opened＿＿＿＿＿＿traffic＿＿＿＿＿＿＿ April 4, 1985. 
          A．to； onB．to； inC．by； onD．for； on
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          A
          be opened to traffic的意思是“通車”；在具體的某一天之前通常用on。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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