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          ---Wow! These inventions are amazing．
          —They were all invented _______years ago.
          A．hundredB．hundredsC．hundred of D．hundreds of
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          D

          試題分析：英語中數(shù)詞表示概數(shù)時，后面加s，和介詞of搭配使用。用原形時表示具體數(shù)字和數(shù)詞搭配使用。句意：喔，這些發(fā)明太神奇了�！麄兪嵌嗄暌郧鞍l(fā)明的。結(jié)合語境可知下文表示概數(shù)，故選D。
          點評：英語中關(guān)于hundred、thousand和million三個數(shù)詞的用法只需要記住一個原則就行。即；前有數(shù)詞則不加s，加s必加of。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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