Упр. 112. Раскройте скобки, употребляя глаголы в форме Past Perfect или Past Perfect Continuous. 1. They (to discuss)

1. They had been discussing this question for an hour when I came into the room. 2. We had been in Paris for three days when our father called on. 3. I had been waiting for this letter for a month when the postman brought me it. 4. Only she dared to tell him the truth, as she had known him for many years. 5. They had been married for ten years when I met them. 6. My sister had been unpacking her things for half an hour when her friend rang her. 7. They left the flat where they had been living for twenty years. 8. She had been in her room for two hours when somebody knocked the door. 9. He had been serving in this house for six years when the war began. 10. The pupils had been writing the test for twenty minutes when their teacher left the classroom. 11. My friend was angry, as somebody had been ringing him all night. 12. I didn\'t like the house, even though I had been living in it for many years.