II. Complete the following sentences using: for, since, ago
1. It's two years __________ I last saw Quoc Anh.
2. Lan and Minh have lived in Ho Chi Minh City __________ 1999.
3. The book has sold over a million copies __________ its publication.
4. The house is very dirty. We haven’t cleaned it __________ ages.
5. There has been a drought __________ the last two summers.
6. They arrived home ten minutes __________.
7. They first met a long time __________.
8. They have known each other __________ a long time.
9. Things have changed a lot _______ our previous meeting.
10. We haven't had a good meal __________ three weeks.
11. We’ve just bought a new washing machine __________ a couple of days.