Помогите.
Exercise 2. Put the verbs in brackets into the Past Perfect Passive.
1. This guitar ... (tune) before I broke a string (струна) and had to tune it again.
2. This house ... (paint) pink before it was given a fresh coat of paint (свежий слой
краски). Now it’s blue. 3. These bees ... (keep) in a large hive (улей) before they
were taken out and examined by the beekeeper. 4. This man ... (give) Novocain before the dentist started working on a cavity (дупло (в зубе) that needed a filling.