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				― Where is Mr. Smith?  Have you seen him?― He          be in his office.― He          be in his office, for I left there just now.A. may, can’t    B.  can, may not   C.  man, mustn’t  D. can, don’t  have to			【查看更多】
			


		
           
          


		
          
		
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           -- Where is Mr. Smith?  Have you seen him?
              
           -- He _____ be in his office.
              
           -- He _____ be in his office, for I left there just now.
              
          A. may; can’t　  B. can; may not　  C. may; mustn’t　 D.  can; don’t have to
              
          　　                    
          

			
          
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