Контрольные задания

Вопрос:

Фото задания: Упражнения - 3. 9. When I (to open) the door, the cat (to sit) on the table.

Фото задания

Упражнения - 3. 9. When I (to open) the door, the cat (to sit) on the table.

When I opened the door, the cat was sitting on the table.