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          Echo       for half a month. She’ll come back in two months.
          A．leftB．leavesC．has leftD．has been away
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          D
          因?yàn)楸揪涞臅r(shí)間狀語(yǔ)，為for +一段時(shí)間，此時(shí)要求動(dòng)詞為延續(xù)性動(dòng)詞，只有D，表示已經(jīng)離開了！故選，且相當(dāng)于延續(xù)性動(dòng)詞，故選答案為D
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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