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				53．A．until          B．when          C．unless          D．since			【查看更多】
			


		
     
    


		
    
		
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    Every parent hopes that their child will live a better life         they grow up．
        
    A．until                                B．when               C．since                      D．unless
        
    

			
    
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    – Would you like to go bike riding with us tomorrow?
      
    – Sure, ________ I am busy．
      
    A． since        B． unless         C． when           D． until
    

			
    
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    －Would you like to go bike riding with us tomorrow?
    

    －Sure, ________ I am busy．
    

    

    [　　]
    

    A．

    since
    

    

    B．

    unless
    

    

    C．

    when
    

    

    D．

    until
    

    

    

			
    
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    －Would you like to go bike riding with us tomorrow?
    

    －Sure, ________ I am busy．
    

    

    [　　]
    

    A．since
    

    

    B．unless
    

    

    C．when
    

    

    D．until
    

    

    

			
    
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    －Would you like to go bike riding with us tomorrow?
    

    －Sure, ________ I am busy．
    

    

    [　　]
    

    A．since
    

    

    B．unless
    

    

    C．when
    

    

    D．until
    

    

    

			
    
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