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          You don’t know how difficult the job is,           you have done it yourself.
          A．unlessB．sinceC．ifD．because
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          A

          試題分析：句意：你不知道這項(xiàng)工作有多么難，除非你親自做了。A除非，如果不，B自從C如果D因?yàn)椋鶕?jù)句意故選A
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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