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          【題目】I was taught to sit quietly in class and not to speak______ someone asked me a question.
          A.WhenB.unlessC.becauseD.if
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          【答案】B
          【解析】
          考查連詞。句意：我被教導要靜靜地坐在課堂上不說話除非有人問我問題。A. when當……時候；B. unless除非；C. because因為；D. if如果。根據(jù)句意，除非有人問我問題，在課堂我就安靜地坐著不說話。用unless引導條件狀語從句。故選B。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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