11. We have been working for this company for 20 years now.
12. If they weren't ill, they could attend the meeting today.
13. Peter said he was going to visit Hanoi the following week.
14. This bridge was built a long time ago.
15. The weather was so bad that we couldn't go on a picnic.
16. It takes us one hour to learn English every day.
17. He is interested in practising speaking English with foreign people.
18. This girl is not old enough to drive a car.
19. Would you mind opening the window for me, please?
20. No matter how hard Lam works, he cannot support his large family.