1. Make the sentences interrogative: 1) The enemy had destroyed the town before 1942. 2) They had gone for a walk before they finished working. 3) The travellers lost their way because they had left the map in the camp. 4) She had called them back after she had arrived. 5) The show had begun before they entered the hall. 6) The group had become popular by the end of the 21st century. 7) The writer had finished the book before the war broke out. 8) We had found the information by the end of the week. 9) I had tell school before it was repaired. 10) The tourists had reached the camp before the thunderstorm began.

Перевод задания: Сделайте предложения вопросительными.

1. Had the enemy destroyed the town before 1942? (Разве враг разрушил город до 1942 года?)

2. Had they gone for a walk before they finished working? (Они пошли прогуляться до того, как закончили работать?)

3. Had the travellers lost their way because they had left the map in the camp? (Путешественники заблудились потому, что оставили карту в лагере?)

4. Had she called them back after she had arrived? (Она позвала их обратно после того, как приехала?)

5. Had the show begun before they entered the hall? (Представление началось до того, как они вошли в зал?)

6. Had the group become popular by the end of the 21st century? (Группа стала популярной к концу XXI века?)

7. Had the writer finished the book before the war broke out? (Писатель закончил книгу до начала войны?)

8. Had we found the information by the end of the week? (Мы нашли эту информацию к концу недели?)

9. В исходном предложении, по-видимому, опечатка: tell должно быть told; также перед school требуется артикль или уточнение. При чтении «сказал школе»: Had I told the school before it was repaired? (Я сообщил школе об этом до того, как её отремонтировали?)

10. Had the tourists reached the camp before the thunderstorm began? (Туристы добрались до лагеря до того, как началась гроза?)

В вопросе в Past Perfect вспомогательный глагол had ставится перед подлежащим.