seven o'clock
If it is good for him , it must be for us . I mean to do it , '' said Grace , shutting her book with a snap and pacing back and forth excitedly . `` Oh , well , take it calmly ; we can do that while we are getting supper , and I am hungry now . Do you know it is seven o'clock ? '' Kate exclaimed , looking at her watch . `` Two hours we have been studying , '' said Grace . `` Really , this is as interesting as painting .