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    【題目】—_______you ever________part in an environmental project? —Yes, I have.
    A.Did, takeB.Have, takenC.Do, takeD.Are, taking
    			
    


			
    

		
    
		
		
	
    
		
    
			
    
				
    
				
    【答案】B
    【解析】
    句意：——你曾經(jīng)參加過環(huán)保項(xiàng)目嗎? ——是的。
    考查動(dòng)詞時(shí)態(tài)。根據(jù)本句中“ever曾經(jīng)”及“Yes，I have.”提示可知，本句時(shí)態(tài)為現(xiàn)在完成時(shí)，助動(dòng)詞為have，動(dòng)詞take用動(dòng)詞過去分詞taken。故選B。
    				
    
							
    
			
    
			
    
			
			
    
		
    
	
    

		
    

		





			
    
		
    
		
				
    
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