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          【題目】The tech industry expo, which attracted more than 180, 000 people, was a reminder of   the tech industry is best at: being optimistic about itself.
          A. thatB. how
          C. whatD. which
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          【答案】C
          【解析】
          考查介詞的賓語從句。句意：吸引了18萬多人參加的科技產(chǎn)業(yè)博覽會提醒人們，科技產(chǎn)業(yè)最擅長的是:對自己保持樂觀。此處介詞of后面是一個賓語從句，從句沒有引導(dǎo)詞，且從句謂語部分缺少主語，所以用what其雙重作用，故選C。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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