three o'clock
`` I 've left my library book in the gym . and it 's a week overdue now . I shall simply have to go back and get it . It 's only three o'clock , '' she added , consulting her watch . `` Who will go with me ? '' `` Of what use is it for all of us to go , '' complained Nora . `` We 'll wait right here for you and you can hurry faster by going alone . ''