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				 The troops      on for three days and nights. The soldiers are in great need of rest.   A. had marched        B. have been marching       C. marched              D. are marching			【查看更多】
			


		
           
          


		
          
		
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          The troops ____ on for three days and nights．The soldiers are in great need of rest．
            
          A．had marched                  B．have been marching
            
          C．marched                                      D．a(chǎn)re marching
          

			
          
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