Odpowiedź:
1. Bertha ......had been driving...... (drive) for three hours when it started to rain.
2. Thomas...............had never eaten.................(never/eat) frogs' legs before his trip to Paris.
3. Jenny was cold because she .............had been standing............... (stand) at the bus stop since six o'clock.
4. The children .......had already finished....... (already/finish) their homework by the time the film started.
5. Colin .........had been playing........ (play) the flute for three years when he gave his first concert.
6. The football team decided to celebrate after they ..........had won............(win) the match.
7. Mr Franks complained to his neighbours because their dog........had been barking........(bark) all night long.
8. The robbers.........had escaped.....(escape) before the police arrived at the bank.
9. Bob ..........had been trying.................... (try) to get tickets for the play since the previous week.
10. Phil couldn't take any photographs because he ...............had
broken............. (break) his camera.
Wyjaśnienie:
