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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(dǎo)要靜靜地坐在課堂上不說話除非有人問我問題。A. when當(dāng)……時(shí)候；B. unless除非；C. because因?yàn)椋?/span>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(dǎo)條件狀語從句。故選B。
    				
    
							
    
			
    
			
    
			
			
    
		
    
	
    

		
    

		





			
    
		
    
		
				
    
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