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          —Where's that report?
          —I brought it to you ________ you were in Mr.Black's office yesterday.
          A．ifB．whenC．becauseD．before
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B
          該空表示“當(dāng)……的時(shí)候”，因此應(yīng)填when引導(dǎo)時(shí)間狀語(yǔ)從句。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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