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          I haven’t seen you for a couple of days. What have you been up _____?
          A．inB．toC．withD．for
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B
          考查詞組be up to在口語中的含義“計謀什么（壞事）；做什么”。除此以外，be up to還表示時間、地點、程度“到…為止”、“是某人的責(zé)任；由某人決定”。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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