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          — When _______ you _______ to learn to ride your bike？
           — I really can’t remember the time.
          A．do; beginB．did; beginC．have; begunD．had; begun
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B
          本題根據(jù)語境看判斷是一般過去時，故選B
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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