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				 I       a flight attendant for two years now.          A. have  become   B. have  been   C.  became      D. was			【查看更多】
			


		
           
          


		
          
		
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          I ______a flight attendant(空中服務(wù)員) for two years now. 
            
          A. have become     B. have been      C. became        D. was
          

			
          
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