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				23．A．In           B．During        C．At        D．For			【查看更多】
			


		
           
          


		
          
		
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          Do you often work late _____ night.
          


          
 
          
  
  
          A．a(chǎn)t
          
            		
  
  
          B．in
          
            		
  
  
          C．for
          
            		
  
  
          D．during
          
            		
 
          

          


           
          

			
          
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          _____ a cold morning, he left for his hometown.
          

          [　　]
          
          

          

          

          A．In
          		


          B．At
          		


          C．On
          		


          D．During
          		

          

          

          

          

			
          
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          ________ a cold morning, he left for his hometown．
          

          

          [　　]
          

          A．In
          

          

          B．At
          

          

          C．On
          

          

          D．During
          

          

          

			
          
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          ________ those two years he studied maths very hard.
          

          [　　]
          

          

          

          A．During
          		


          B．At
          		


          C．In
          		


          D．For
          		

          

          

          

			
          
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          ________ those two years he studied maths very hard.
          

          [　　]
          

          

          

          A．During
          		


          B．At
          		


          C．In
          		


          D．For
          		

          

          

          

			
          
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