1. By the end this month, they (be) in HaNoi for 1 month. → 2. By December, we (learn) English for 6 years. → 3. By the end of this week, they (marry) for 2 years. → 4. We (finish) this work in 3 days. → 5. By the time they arrive at the village, all the villagers (leave) for another valley. 6. By the time he gets to the airport, the plane (take) off. → 7. When we go to our class, the lesson (start) for 15 minutes. → 8. I know before they come to my house, I (go) out for a walk. → 9. We have got 2 hours. We (do) all the house work by the time your parents arrive. 10. These machines (work) very well when they get their first service next month. → 11. By the time we find them on the mountain, they (suffer) from coldness and hunger for 6 hours. → 12. By this time tomorrow they (visit) Paris for the first time. → 13. Tom is a first year student. By the end of next year, he (learn) chemistry for 3 years→ 14. By 2010, the number of schools in our country (double). → 15. In twelve month’s time, the average income of our people in our country (rise) 5 percent, while inflation (not rise) at all. → 16. I hope they (repair) the road which leads to Huong Vy and Dong Son commune by the time we come back next summer. → 17. Roy can’t ski better. I know by the end of this month, he (have) lessons for a full month. → 18. By the time you arrive, I (write) the essay. → 19. By the year 2012 many people (lose) their jobs. → 20. By 5:30 p.m, we (sit) here for 3 hours. → 21. In 10 more minutes, they (wait) for him for 2 hours. → 22. Before he graduates from his university, he (stay) in HaNoi city for 4 years. → 23. When she retires, he (work) for this factory for 30 years. → 24. By the time we get to the nearest city, we (drive) for 5 days. →