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           You can’t catch up with others         you work hard.
          A．untilB．a(chǎn)fterC．unlessD．When
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          C

          試題分析：
          句意：除非你努力，否則你不可能趕上別人。 until直到---才---， after 在---之后，unless 除非，When當(dāng)---時(shí)候。根據(jù)句意，應(yīng)選用表示讓步的連詞unless。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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