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           —Whose book is this? 
          —It _____ be Mary’s. Mo Yan is her favorite author. 
          —No, it ____ be hers, she never brings novels to school.
          A．may; mustn’tB．can; can’tC．must; can’tD．must; mustn’t
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          C

          試題分析：句意:-這是誰的書？-它一定是Mary的，莫言是她最喜歡的作家。-不，不可能是她，她從來沒有把小說帶到學校來。本題考查情態(tài)動詞表示推測的用法，在肯定句中表示有把握的推測用must;否定句中用can’t 表示不可能。must 不能用于否定句。故選C。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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