You had better not judge a person _____ his appearance.— I know all the people dressed _____ rags are not beggars[ ]

The car almost ran into the boy ________ it stopped[ ]

Did he come back late last night? —No．It was not yet eight o’clock _____________ he arrived home

________ I know, the place where we used to ________ our flag has become a modern teaching building.[ ]

The single most important factor ____ contributes to success is _____ you do every single day．