1. They had seven lessons. 2. They were absent. 3. The girls took the box. 4. The girls slept in the tent. 5. The girls were in the tent. 6. They made a mistake. 7. It was late. 8. He was late. 9. He got up late. 10. The boys had a party. 11. The boy had a plan. 12. It was a good plan.

Решение:

Необходимо преобразовать утвердительные предложения в вопросительные, выражающие удивление. Для этого будем использовать вспомогательные глаголы did или were, в зависимости от времени и типа глагола в исходном предложении.

1. They had seven lessons. - Did they have seven lessons? (Используем did, так как had - прошедшая форма глагола have).
2. They were absent. - Were they absent? (Используем were, так как это глагол to be в прошедшем времени).
3. The girls took the box. - Did the girls take the box? (Используем did, так как took - прошедшая форма глагола take).
4. The girls slept in the tent. - Did the girls sleep in the tent? (Используем did, так как slept - прошедшая форма глагола sleep).
5. The girls were in the tent. - Were the girls in the tent? (Используем were, так как это глагол to be в прошедшем времени).
6. They made a mistake. - Did they make a mistake? (Используем did, так как made - прошедшая форма глагола make).
7. It was late. - Was it late? (Используем was, так как это глагол to be в прошедшем времени).
8. He was late. - Was he late? (Используем was, так как это глагол to be в прошедшем времени).
9. He got up late. - Did he get up late? (Используем did, так как got - прошедшая форма глагола get).
10. The boys had a party. - Did the boys have a party? (Используем did, так как had - прошедшая форма глагола have).
11. The boy had a plan. - Did the boy have a plan? (Используем did, так как had - прошедшая форма глагола have).
12. It was a good plan. - Was it a good plan? (Используем was, так как это глагол to be в прошедшем времени).

Ответ: 1. Did they have seven lessons? 2. Were they absent? 3. Did the girls take the box? 4. Did the girls sleep in the tent? 5. Were the girls in the tent? 6. Did they make a mistake? 7. Was it late? 8. Was he late? 9. Did he get up late? 10. Did the boys have a party? 11. Did the boy have a plan? 12. Was it a good plan?