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				 No one has       been able to trace the author of the poem.  A. still  B. yet C. already D. just  [答案] B. yet  [注釋] yet 常用于現(xiàn)在完成時的否定句中, 意為“尚, 還 .			【查看更多】
			


		
           
          


		
          
		
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          No one has _____ been able to trace the author of the poem.
            
                   A. still                           B. yet                           C. already                           D. just
          

			
          
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           No one has _____ been able to trace the author of the poem.
            
                  A. still        B. yet            C. already       D. just
          

			
          
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          No one has _____ been able to trace the author of the poem.
            
          A. still        B. yet        C. already       D. just
          

			
          
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          8. No one has _____ been able to trace the author of the poem.
            
          A. still   B. yet   C. already   D. just
          

			
          
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           No one has _____ been able to trace the author of the poem.
            
          A. still   B. yet   C. already   D. just
          

			
          
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