難度:★  考點:情態動詞辨析
	
	  1.That man______be my English teacher.He has gone to Canada.
	
	  A.needn't   B.mustn't   C.can't
	
	  2.-Look!A book is on the floor.Whose is it?
	
	  -It______be Rick's.It has his name on it.
	
	  A.mustn't   B.can't   C.must   D.need
	
	  3.一Shall I tell Jim the good news?
	
	  一No,you________.I've told him already.
	
	  A.wouldn't   B.needn't   C.shouldn't   D.mustn't
        
