1. When we came to the station the train (to go) already. 2. They (to complete) the project before the deadline. 3. I (to work) for the same company for twelve years. 4. Don't buy the tickets. I (to buy) them. 5. So far we (to pass) 3 exams. 6. won't be able to talk to you in 15 minutes because (to write) a quiz. 7. By the end of this month we (to live) together for six years. 8. I was very tired when I got home. I (to work) hard all day. 9. The numbers of regular customers (to increase) steadily. 10. am going to have a nice time as soon as I (to pass) all the exams.

1. had gone2. had completed3. have been working4. have bought5. have passed6. I'm writing7. will have been living8. had been working9. have been increasing10. pass