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          Stamps ______ sending letters.
          A．used toB．a(chǎn)re used toC．a(chǎn)re used forD．a(chǎn)re using
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          C
          本題的含義是郵票被用來發(fā)信，be used for sth，故本題選C。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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