Our office is on the first floor.（英译中)

We put the books in piles on the floor.（英译中)

On the wall of his office was a large map.（英译中)

The telephone was in the little study on the ground floor.（英译中)

Sunday is the first day of the week.（英译中)

We planned to floor our room with oak.（英译中)

Our new house is on the 【first】 floor.A. bottomB.