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          When I came home, my father _____ an e-mail on the computer. 
          A．writesB．wroteC．is writingD．was writing
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          D
          考察時態(tài)。句意：當我回到家時，我的父親正在電腦上寫電子郵件。結(jié)合語境可知主句描述的是過去正在進行的動作，故用過去進行時態(tài)。故選D
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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