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          一What are you going to do this weekend?
          一Well，we’ll clean up the city parks _______ it rains .
          A．ifB．untilC．whileD．unless
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          D

          試題分析：句意：----你這個周末打算去做什么？---我們將打掃城市公園，除非下雨。if如果；until直到；while正當……時候；unless除非。因此，選D。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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