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          _______ you start eating in a healthier way, weight control will become much easier.
          A．UnlessB．AlthoughC．BeforeD．Once
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          D

          試題分析：句意：一旦你開始更健康的飲食，控制體重就會(huì)變得容易得多。unless除非；although盡管；before 在……之前；once 一旦。unless相當(dāng)于if not，引導(dǎo)條件狀語從句；although引導(dǎo)讓步狀語從句，不能和but連用；before引導(dǎo)時(shí)間狀語從句；once引導(dǎo)具有條件意味的時(shí)間狀語從句。根據(jù)語境和詞義可知選D。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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