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          By the year 2170, people _____ cities and industries on Mars. 

          A. establish 
          B. established 
          C. will have established 
          D. have established 
          			
          

			
			
			
		
          



							
          
				相關(guān)習(xí)題
			
          	
						
          
			
          
				科目：高中英語
				來源：0109    期末題
				題型：單選題
			
          
									
          By the year 2170, people _____ cities and industries on Mars. 
          

          [     ]
          A. establish 
          B. established 
          C. will have established 
          D. have established 
          

			
          
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