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          He earned enough money to start his own business _____ offering guide services _____ tourists.
          A．by; toB．with; at
          C．on; for D．through; with
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          A
          介詞by可以表示手段、原因，常置于動名詞前，如：You can make the cake by mixing eggs and flour. 其次考查介詞與動詞offer的搭配，offer sth. to sb. =" give" sth. to sb.其中的to表示對象。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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