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				4．--It must be  John who is in the office．--I'm sure it           be John．I saw him off  at the railway station just twenty minutes ago．A．won't         B．mustn't        C．can't        D．needn't			【查看更多】
			


		
     
    


		
    
		
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    --It must be John who is in the office．
      
    --I'm sure it ________ be John．I saw him off at the railway station just twenty minutes ago．
      
    A．won't         B．mustn't           C．can't         D．needn't
    

			
    
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    －It must be John who is in the office．
    

    －I'm sure it ________ be John．I saw him off at the railway station just twenty minutes ago．
    

    

    [　　]
    

    A．won't
    

    

    B．mustn't
    

    

    C．can't
    

    

    D．needn't
    

    

    

			
    
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