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          Since we ________ our homework now. Let’s have a rest. 
          A．doB．a(chǎn)re doing C．will do D．have done
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          D
          since 為陳述原因，而根據(jù)后文的內(nèi)容Let’s have a rest.可知事情已經(jīng)做了，故用現(xiàn)在完成時，故選D
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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