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          It is known to all that         you exercise regularly , you won’t keep good health .
              A．unless         B．whenever       C．a(chǎn)lthough       D．if 
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          A  
          解析：此題考查了連詞的用法。unless相當(dāng)于if …not，引導(dǎo)條件狀語(yǔ)從句。其他選項(xiàng)均不含否定的假設(shè)，用于此處都不合適。
            
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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