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				1．I usually sleep with the window open        it’s very cold.			【查看更多】
			


		
     
    


		
    
		
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    I usually sleep with the window open _____ it’s very cold.
    A．untilB．unlessC．whenD．if
    

			
    
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    I usually sleep with the window
open _____ it’s very cold.
    


    A.
until          B.
unless        C.
when          D. if
    


     
    

			
    
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    I usually sleep with the window open _____ it’s very cold.
    A．untilB．unlessC．whenD．if
    

			
    
				查看答案和解析>>
			
    
		
    
				
    
									
    I usually sleep with the window open _____ it’s very cold.

    1. A.
      until
    2. B.
      unless
    3. C.
      when
    4. D.
      if
    

			
    
				查看答案和解析>>
			
    
		
    
				
    
									
    I usually sleep with the window open ________ it's very cold.

    1. A.
      until
    2. B.
      unless
    3. C.
      as
    4. D.
      if
    

			
    
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