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           ______  it is getting dark.，we’d better hurry
          A．AndB．ButC．SinceD．Unless
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          C               
                       
          試題分析：考查連詞。A. And并且；B. But但是；C. Since因為；D. Unless除非 ； 句意：因為天黑了，我們最好快。Had better do 最好做某事。兩個句子之間是因果關系，故選C項。         
          考點 : 考查連詞
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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