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          The patient's son asked the doctor the question ________ his father could survive the big operation.
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          whether　
          考查同位語從句。在此同位語從句表示一種不確定的狀態(tài)，故用whether引導同位語從句，表示the question的具體內(nèi)容。if一般不用來引導同位語從句。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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