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          I am looking after Tom today.He’s been in my house ______________  8:00 this morning.
          A．since B．for 
          C．a(chǎn)t D．till 
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          A
          

          解析試題分析：句意：我今天一整天都在照顧Tom。他從早晨八點(diǎn)就在我家了。Since+時(shí)間點(diǎn)，用于現(xiàn)在完成時(shí)當(dāng)中。故選A。
          考點(diǎn)：考查現(xiàn)在完成時(shí)的用法。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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