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				18．-How long have you been learning English?-I’ve been learning English         six  years A．for,old    B．since,／    C．for,ago     D．since,ago			【查看更多】
			


		
     
    


		
    
		
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    — How long have you been learning English? 
    — I've been learning English _____ six years _____.
    

    [     ]
    A. for; old
    B. since; /
    C. for; ago 
    D. since; ago 
    

			
    
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