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          What ______ at seven yesterday morning?
          A．is she doingB．was she doingC．did she doD．does she do
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B

          試題分析：句意：昨天早晨七點(diǎn)，她正在做什么？結(jié)合語境可知本句描述的是過去某時(shí)正在進(jìn)行的動(dòng)作，故用過去進(jìn)行時(shí)態(tài)，選B。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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