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          -Be careful! You might fall into the water.
           -Thank you. I____.I______ so close to the pool.
          A．didn't know; am standing 
          B．don't know; am standing
          C．didn’t know; was standing 
          D．didn't know;Would stand
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          C
          根據(jù)下文內(nèi)容可知是之前沒注意，用過去時，根據(jù)上下文的內(nèi)容可知答案為C
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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