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          There are usually 28        in a person’s mouth, so we should listen to the doctor’s ______ to protect（保護(hù)）them.
          A．tooth, adviceB．teeth, adviceC．toothes, advices D．teethes, advices
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B
          本題中的牙齒為可數(shù)名詞，復(fù)數(shù)為teeth，advice為不可數(shù)名詞，故本題選B。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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