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          Linda has been drawing ______.
          A．since 10 yearsB．for 10 years agoC．since 2002D．in 2002
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          C
          現(xiàn)在完成時(shí)的時(shí)間狀語(yǔ)經(jīng)常由since或for來(lái)引導(dǎo)，since引導(dǎo)點(diǎn)時(shí)間，for引導(dǎo)短時(shí)間。都表示段時(shí)間。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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