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          We __________ 1000 English words since we __________ to learn English.
          A．learned; beginB．have learning; began
          C．have learn; begunD．have been learning; began
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          D
          since 引導(dǎo)的時(shí)間狀語(yǔ)從句中，當(dāng)從句中用since+表示一般過去時(shí)時(shí)，主句要用現(xiàn)在 完成進(jìn)行時(shí)或現(xiàn)在完成進(jìn)行時(shí)，（動(dòng)詞必須是延續(xù)性動(dòng)詞）故選D
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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