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          I was about to give up my effort to solve a problem __________ a good idea struck me. 
          A．whenB．whileC．untilD．before
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          A 

          試題分析：考查連詞：AB都有“當(dāng)…的時(shí)候”，when表示時(shí)間點(diǎn)，而且和be about to連用，表示“剛要做…這時(shí)”，while表示時(shí)間段，until直到，before在…前面，句意：我剛要放棄努力解決這個(gè)問(wèn)題這時(shí)哦想到一個(gè)好主意。選A。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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