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          We never know we will succeed ________ we actually try.
          A．until B．when C．unless D．though 
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          A
          

          解析試題分析：句意：直到我們真正的嘗試才知道是否會(huì)成功。never…until“知道……時(shí)候才”。 B. when“當(dāng)……時(shí)候”；C. unless“除非”；D. though“盡管”，故選A。
          考點(diǎn)：考查連詞的辨析。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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