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    【題目】Hey, you ________ at the computer all day. You should really take a break now.
    A.have been sittingB.were sitting
    C.did sitD.are sitting
    			
    


			
    

		
    
		
		
	
    
		
    
			
    
				
    
				
    【答案】A
    【解析】
    考查現(xiàn)在完成進行時態(tài)。句意：嘿，你整天都坐在電腦前。你現(xiàn)在真的應該休息一下。結(jié)合句意可知，表示從過去開始一直進行的動作，用現(xiàn)在完成進行時態(tài)，故選A。
    				
    
							
    
			
    
			
    
			
			
    
		
    
	
    

		
    

		





			
    
		
    
		
				
    
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