Ответ:

Перед существительным в единственном числе употребляем There's, во множественном — There are. Предмет находится in в комнате и обычно on на поверхности.

  1. There are two girls in the bedroom.
  2. There's a clock in the kitchen.
  3. There are two doors in the living room.
  4. There's a picture on the wall.
  5. There are three windows in the bathroom.
  6. There are two beds in the bedroom.
  7. There's a bag on the floor.
  8. There are three boys in the living room.
  9. There's a book on the table.
  10. There's a camera on the table.
  11. There are board games in the dining room.