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          Sam will make more progress if he__________harder.

          A. will work
          B. was working
          C. works
          D. worked
          			
          

			
          
				
          
		
		
	
          
		
          
			
          
				
          
				C				
          
			
          
			
          
				
          
			
          
			
          
				
          
			
          
			
          
				
          
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				科目：初中英語(yǔ)
				來(lái)源：同步題
				題型：單選題
			
          
									
          Sam will make more progress if he__________harder.
          

          [     ]
          A. will work
          B. was working
          C. works
          D. worked
          

			
          
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