Ответ:

Перевод задания: Поставьте глаголы в скобках в правильную форму. Используйте Past Simple, Past Continuous, Past Perfect или Past Perfect Continuous.

  1. They had been driving for hours before they stopped for a break.
    Они ехали несколько часов, прежде чем остановились на перерыв.
  2. The birds were singing in the trees while our cat wasn’t in the garden.
    Птицы пели на деревьях, пока нашей кошки не было в саду.
  3. I had already eaten dinner by the time my friends arrived.
    Я уже поел к тому времени, когда пришли мои друзья.
  4. The children were playing in the park when it started to rain.
    Дети играли в парке, когда начался дождь.
  5. She had breakfast, packed up and went on an excursion to the city.
    Она позавтракала, собрала вещи и отправилась на экскурсию в город.
  6. Yesterday, from 5 p.m. to 7 p.m., I was riding a bike.
    Вчера с пяти до семи вечера я катался на велосипеде.
  7. Had you done your homework by the time the series started?
    Ты сделал домашнее задание к тому времени, когда начался сериал?
  8. She had been working on her project for weeks before she finally finished it.
    Она работала над проектом несколько недель, прежде чем наконец закончила его.

Ответ: 1 — had been driving; 2 — were singing; 3 — had already eaten; 4 — were playing; 5 — had, packed up, went; 6 — was riding; 7 — Had, done; 8 — had been working.