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          —Look at the boy running on the ground. Is it Davis?
          —It ______ be him. I saw him go to the teacher’s office just now.
          A．mustn’tB．can’tC．couldD．might
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B

          試題分析：句意：—看那個(gè)在地上跑的男孩，他是David嗎？—他一定不是David，我剛才看到他去老師的辦公室了。此空表示否定推測(cè)“一定不是”，應(yīng)用can’t，mustn’t是不準(zhǔn)的意思，故選B。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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