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          ______ children believe they can succeed, they will never become totally confident．
          A．IfB．SinceC．OnceD．Unless
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          D

          試題分析：句意：除非孩子們相信他們能夠成功，否則他們將不會(huì)完全有自信。If如果；Since自從；Once一旦；Unless除非，選D。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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