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          He used the small room ___ a lab.
          A．likeB．a(chǎn)sC．toD．a(chǎn)bout
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B
          本句中的as是介詞，表示“作為”。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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