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          We should make contributions ______ our environment.
          A. to protecting        B. to protect               C. protecting
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          A

          試題分析：句意：我們應該為保護環(huán)境做貢獻。make contributions to+Ving/n. 為···做貢獻。protecting 做賓語，故選A
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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