13. of, to, on, on, on, of.
14. a bed, a wardrobe, a table, a chair, a bookshelf.
a mirror, a computer, an arm-chair, a sofa, a flowershelf.
15. -, a, the, the, the, the, a, a, a, a, -, -, the, -.
16. is, are, are, is, are.
17. on the floor, in the left corner, in the right corner, under the bed, over/above the table, behind the arm-chair, between the sofa and the piano, near the fireplace.
18. wash, watch, go, do.
19 там не видно.
Надеюсь, все правильно и я помогла. Удачи.