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				6．So far，the students ____2，000 English words．（　�。�
          A．learnB．learnedC．have learnedD．had learned
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          分析 到目前為止，學(xué)生們已經(jīng)學(xué)了2000個(gè)英語(yǔ)單詞了．
          解答 答案：C
          根據(jù)句中時(shí)間狀語(yǔ)為so far"到目前為止、迄今為止"強(qiáng)調(diào)過(guò)去發(fā)生的動(dòng)作一直持續(xù)到現(xiàn)在，故確定謂語(yǔ)動(dòng)詞用現(xiàn)在完成時(shí)，其結(jié)構(gòu)為have/has+過(guò)去分詞，根據(jù)主語(yǔ)為the  students 助動(dòng)詞用have，learn的過(guò)去分詞為learned，故填have learned，故選C
          點(diǎn)評(píng) 本題考查現(xiàn)在完成時(shí)態(tài)．判斷時(shí)態(tài)要找準(zhǔn)動(dòng)作發(fā)生的時(shí)間，然后根據(jù)時(shí)態(tài)構(gòu)成選出正確的答案
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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