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          —Jim, have you done  homework_________?
          ---- Yes, I have _____ done it.
          A．a(chǎn)lready; yetB．yet; yetC．a(chǎn)lready; alreadyD．yet; already
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          D
          在疑問句或否定句中用yet表示已經(jīng)的含義，在肯定句中用already表示此意，故本題選D。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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