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           Work hard at your lessons, ______ you’ll fail the exams again.
          A．a(chǎn)ndB．butC．otherwiseD．besides
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          C

          試題分析:考查連詞用法。A并且；B但是；C否則；D此外。從句意可知后句是一種警告，表示如果不努力，將要出現(xiàn)的結(jié)果。所以C選項正確。句意：努力學習你的功課，否則你會再次考不及格的。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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