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          If any accident ______ here tomorrow, it will be very serious.
          A．happensB．will be happenedC．will happenD．is happened
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          A
          A if“如果”，引導條件狀語從句，遵循“主將從現(xiàn)”原則，即用一般現(xiàn)在時代替將來時。排除B、C；事故發(fā)生，是主動的，不必用被動語態(tài)，排除D。故選A。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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