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                    you practice your English every day, you won’t make any progress on it.
          A．AlthoughB．UnlessC．IfD．Since
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B
          Unless: conj. 除非, 如果不 
          unless是從屬連詞，引導(dǎo)條件狀語從句，含有否定意義，相當(dāng)于if條件狀語從句的否定形式。所以u(píng)nless =" if" not。注意：unless引導(dǎo)的條件狀語從句和if條件狀語從句，與其它時(shí)間狀語從句一樣，用一般現(xiàn)在時(shí)代替將來時(shí)
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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