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				 Unless       to speak, you should remain silent at the conference.  A. invited     B. inviting    C. being invited   D. having invited			【查看更多】
			


		
           
          


		
          
		
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            Unless ____ to speak,  you should remain silent at the conference.
            
          A invited         B inviting           C being invited    D having invited 
          

			
          
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          Unless ________ to speak, you should remain silent at the conference
            
           A. invited         B. inviting      C. being invited    D. having invited
            
          6.____,the experiment will be successful.
              
           
          

			
          
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          Unless ________ to speak,you should remain silent at the conference.     
          

          [      ]
          A. invited     
          B. inviting       
          C. being invited      
          D. having invited
          

			
          
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          Unless _____ to speak, you should remain silent at the conference. 
          

          [     ]
          A. invited 
          B. inviting
           C. being invited
           D. having invited 
          

			
          
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           Unless _____ to speak, you should remain silent at the conference. 
            
            A. invited                        B. inviting                            C. being invited                D. having invited
          

			
          
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