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          ---What are you going to do this weekend ?
          --- Well, we’ll clean up the city parks ________ it rains..
          A．if B．until C．while D．unless
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          D

          試題分析：句意：這個(gè)周末你們要做什么？如果不下雨的話我們要打掃城市公園。unless 除非，如果不，相當(dāng)于if not;根據(jù)句意，故選D。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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