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1/ My wall-unit which I bought two days ago is very convenient.

    Wall-unit standing in the living room is brown but in the kitchen there is white one.

    We dodn't want to buy a new wall-unit.

2/ There is no cushion on my new sofa.

    Two new cushions bought yesterday are in the bedroom.

     "Put the cushion on the bed!" - said mother angry.

3/ I paint the ceiling of the kitchen every year.

    The ceiling of the kitchen is painted every year.

     We have to paint the ceiling of the kitchen every year.

 4/ We have to bring an old stand-hall to our new flat.

    We are suggested to buy a new stand-hall to our new flat.

     We decided to take out our old stand-hall when we removed to our new flat.