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          How can you expect him to make any improvement ________ you never give him an opportunity to have a try?
          A．unlessB．whenC．untilD．while
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B

          試題分析：考查連詞：A．unless 除非，B．when當…時候，既然，如果，C．until直到，D．while即使，雖然，然而，當…時候，句意：既然你不從來不給他任何機會去嘗試，你又怎么能夠知道他不會有任何的進步呢？選B。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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