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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。
          考查動詞時態(tài)。根據(jù)本句中“ever曾經(jīng)”及“Yes，I have.”提示可知，本句時態(tài)為現(xiàn)在完成時，助動詞為have，動詞take用動詞過去分詞taken。故選B。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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