NastyaK99
1) They had been discussing the question for an hour when I came into the room 2) I had been waiting for this letter for a month when the postman brought me it 3) My sister had been unpacking her things for an hour when her friend rang her 4) They left the flat where they had been living for 20 years
Answers & Comments
2) I had been waiting for this letter for a month when the postman brought me it
3) My sister had been unpacking her things for an hour when her friend rang her
4) They left the flat where they had been living for 20 years