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          When the school building began to shake，the teachers ran downstairs ________ all the students．The teachers are real heroes．
            
          A．after             B．with             C．before
            
            
         
        
         			
          

			
          
				
          
		
		
	
          
		
          
			
          
				
          
				  
            
          1、A
            
            				
          
			
          
			
          
				
          
			
          
			
          
				
          
			
          
			
          
				
          
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          When the school building began to shake，the teachers ran downstairs ________ all the students．The teachers are real heroes．
            
          A．a(chǎn)fter             B．with             C．before
          

			
          
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