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				 All possible means      . However, nothing can    him  dying of lung cancer.A．has tried; stopB．have been tried; keepC．has been tried; preventD．have been tried; stop			【查看更多】
			


		
     
    


		
    
		
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    All possible means ________. However, nothing can ________ him dying of lung cancer.
    

    [　　]
    

    A．has tried, stop
    

    B．have been tried, keep
    

    C．has been tried, prevent
    

    D．have been tried, stop
    

			
    
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    All possible means ________. However, nothing can ________ him dying of lung cancer.
    

    [　　]
    

    A．has tried, stop
    

    B．have been tried, keep
    

    C．has been tried, prevent
    

    D．have been tried, stop
    

			
    
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    All possible means _________．However, nothing can _________ him dying of lung cancer．
    

    

    [　　]
    

    A．

    has tried; stop
    

    

    B．

    have been tried; keep
    

    

    C．

    has been tried; prevent
    

    

    D．

    have been tried; stop
    

    

    

			
    
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