Контрольные задания

Вопрос:

Фото задания: Упражнения - 3. 10. When Kate (to open) the door, the children (to dance) round the fir-tree.

Фото задания

Упражнения - 3. 10. When Kate (to open) the door, the children (to dance) round the fir-tree.

When Kate opened the door, the children were dancing round the fir-tree.