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          ______nature reserves _______us learn more about protecting animals.
          A．Studying ; helpB．Studies ; helpsC．To study; helpingD．Studying; helps
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          D

          試題分析：句意：研究自然保護區(qū)有助于我們了解更多的關于保護動物的知識。動名詞做主語后面的謂語動詞用單數(shù)形式；故選D。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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