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          Study hard,_______ you will not pass the exam.
          A．a(chǎn)ndB．orC．butD．so
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B
          四個選項分別表示并列關(guān)系，選擇關(guān)系、轉(zhuǎn)折關(guān)系和因果關(guān)系。根據(jù)句子含義要么努力學(xué)習(xí)，要么不能通過考試，兩者為選擇關(guān)系，選B。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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