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				1．I think it's      useful advice.so I will  always remember it．A．a(chǎn)             B．a(chǎn)n            C．the            D．不填			【查看更多】
			


		
           
          


		
          
		
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          I think it’s_________ useful advice，so I will always remember it．  
          A．a(chǎn)B．a(chǎn)nC．theD．/
          

			
          
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          I think it’s_________ useful advice，so I will always remember it．  
          


          A．a(chǎn)                B．a(chǎn)n               C．the              D．/
          


           
          

			
          
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          I think it’s_________ useful advice，so I will always remember it．  
          A．a(chǎn)B．a(chǎn)nC．theD．/
          

			
          
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          I think it's          useful advice，so I will always remember it．
            
          A．a(chǎn)                         B．a(chǎn)n                       C．the                        D．不填
          

			
          
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