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				 It’s difficult           English well. We must work hard.  A. learn B. learns  C. study  D. to learn			【查看更多】
			


		
           
          


		
          
		
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          It's difficult _____ English well. We must work hard. 
          

          [     ]
          A. learn 
          B. learns 
          C. study
           D. to learn 
          

			
          
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          It’s difficult ________ English well. We must work hard.
            
          A. learn  B. learns   C. study   D. to learn
          

			
          
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          It’s difficult  _________ English well．We must work hard．
            
          A．learn       B．learns          C．study            D．to learn
          

			
          
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