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          【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(yǔ)從句。句意：除非真的有必要，否則請(qǐng)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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