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    精英家教網 > 高中英語 > 題目詳情
    
			
    
				
    【題目】Please don’t call me at the office ________ it’s really necessary.
    A.ifB.unlessC.as ifD.except
    			
    


			
    

		
    
		
		
	
    
		
    
			
    
				
    
				
    【答案】B
    【解析】
    考查條件狀語從句。句意：除非真的有必要，否則請不要給我辦公室打電話。A. if如果；B. unless除非；C. as if好像；D. except除……之外。表示“除非”，故選B。
    				
    
							
    
			
    
			
    
			
			
    
		
    
	
    

		
    

		





			
    
		
    
		
				
    
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