<span>1. If the floor is </span><span>tiled one can easily hear footsteps on it.</span><span><span>
</span>2. Other walls were lined with white bookshelves from which books overflow to the floor.
3. The door between the office and a small dark room at the back always </span><span>stands open.
4. The floors downstairs </span><span>were covered with Indian carpets.
5. The walls were pasted with pictures of aircrafts.
6. A staircase </span><span>lead to from the ground floor to the first floor.
7. The notice </span><span>was pinned up and became the centre of attention.
8. A typewriter, some writing paper, pens and pencils — everything was carefully </span><span>arranged on top of the bookcase.
9. The walls in the sitting-room </span>were papered <span>but not painted, which made the room look a lot cosier.
10. The room </span><span>was full of dark expensive furniture. Oriental carpets, smart lamps, everything first-class.
11. The incident</span><span><span> was concealed </span> and nobody ever learned anything.
12. A sick child was</span> nearly <span>lost beneath the heap of blankets.
13. Books, papers, manuscripts, stacks of letters were</span><span> lying in heaps all around the study.
14. The dining room was</span><span> separated from the rest of the house by a narrow passage.
15. As the tiny house </span><span>was painted green, it was almost lost on the green background of the garden.
</span>
<span>In some countries it is very hot.</span>
When she returned, my homework had already beendone.
or:
When she returned, the essay had already been written.
or:
When she returned, the breakfast had already been eaten.