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          I really don’t know ______ about it.
          A．what to doB．how to doC．to do whatD．how can I do
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          A
          A 考查疑問詞加不定式。do是及物動詞，必須有自己的賓語。選B的話，do缺少賓語，故選A，what作do的賓語。What to do =" how" to do it。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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