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				 ― What’s Carol doing?  ― She’s busy               letters.A. writing     B. write        C. wrote        D. to write			【查看更多】
			


		
     
    


		
    
		
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    —What's Carol doing? 
    —She's busy ______ letters. 
    

    [     ]
    A. writing 
    B. write
     C. wrote 
    D. to write 
    

			
    
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    — What’s Carol doing?
      
    — She’s busy _____________ letters.
      
    A. writing          B. write            C. wrote           D. to write
    

			
    
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