Ответ:

2. Sue and Steve had been playing badminton for half an hour, when it started raining.

3. We had been staying in Italy for a week, as our boss phoned and asked us to get back to work.

4. Hanna had been learning Spanish for two years, as she felt that she should have learnt English instead.

5. They had been travelling around the country for a month, when they decided to stop at the capital.

6. Andrew had been waiting for a train for some time and he felt hungry.

Объяснение: