Uzupełnij luki poprawną formą czasowników w nawiasach w czasie Past Perfect Continuous.
1. John (work) for this company for five years when he got the promotion. 2. How long (attend) Anna lectures before she dropped out? 3. Caroline's latest novel was published in December, but she (collect) information for the whole previous year. 4. Adam (sing) so loudly at the concert that he had a terrible sore throat the next day. 5. I didn't fancy going out in the evening because I (not feel) well the whole day. 6. How long (live) aunt Sandra and uncle John in Australia before they returned to Canada? 7. My sister (look for) her friend for about 10 minutes before she found her in the library. 8. All waiters were dead on their feet at the end of the day after they (serve) the customers for twelve hours. 9. The police revealed that the terrorists (plan) to carry out an attack for a few years but fortunately their organisation was broken up on time. 10. How long (try) you to convince Margaret to apply for this job before she finally agreed to take this challenge?