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          A good teacher must be able to hold his students’ attention ____ he reaches the end of the class.
          A．whenB．a(chǎn)fterC．untilD．unless
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          C

          試題分析：考查連詞辨析。A當(dāng)…時(shí)；B在…后；C直到…才；D除非；句意：好的老師一定能夠吸引教師的注意力，直到這節(jié)課結(jié)束。本句中前面句子的謂語動詞hold his students’ attention是一個(gè)延續(xù)性動詞，如果是短暫性動詞，則使用not…until…；故C正確。
          點(diǎn)評：此題主要考查連詞的辨析，選擇連詞主要是看前后句的關(guān)系，因果關(guān)系用表因果的連詞，轉(zhuǎn)折關(guān)系用轉(zhuǎn)折連詞，并列關(guān)系用并列連詞，要求考生具有一定的句子分析能力和詞義辨析能力。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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