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          –We should do what we can _____ the endangered animals.`
           --Yes, it’s duty_____ them.
          A．save, to protectB．save, protect
          C．to save, protectD．to save, to protect
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          D
          第一空為動(dòng)詞不定式作目的狀語(yǔ)，而It is one‘s duty to do sth，表示做某件事色某人的責(zé)任。故選D
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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