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          ——How often do I need to feed the dog?
          ——It___food everyday, or it will be hungry.
          A．must giveB．must be giveC．must be given D．must be gave
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          C
          句意：我需要多久喂一次這條狗？——必須每天喂它，否則它會餓的。結(jié)合語境可知下文主語it是動作對象，故用被動語態(tài)，選項(xiàng)BD過去分詞形式有誤，故選C。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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