1. Amanda (walk) to school every day.
2. Smartphones (become) more and more efficient.
3. Steve (talk) to Lisa when I saw him.
4. Stop talking or I (send) you out of the class.
5. We (go) to Moscow last winter.
6. Mum (cook) while I was watering the plants.
7. I (learn) German for three years now.
8. It’s late. I (take) a taxi home.
9. Jack (know) Sarah since he was four years old.
10. World War II (break) out in 1939.
11. Mary (fly) to London at 5:00 tomorrow morning.
12. She (never/bake) a cake before.
13. The River Amazon (flow) into the Atlantic Ocean.
14. Look! The man (try) to open the door of уоur car.
15. Jessica (be) seldom late for work.
16. Mr. Moore (open) a new shop in the village next month.
17. We (play) on the beach when it started to rain.
18. I (not/see) Emily for a long time.
19. I believe life (change) for the better soon.
20. Someone (fall) over that box if you don’t move it.

1) the carried out experiment; 2) freight delivered 2 hours ago; 3) a wagon  used for the transportation of liquid goods; 4) new electronic devices displayed at the exhibition; 5) ensured minimum of service; 6) an overcrowded bus; 7) fuel useв in jet engines; 8) a new Metro station decorated with marble and bronze; 9) taken measures; 10) a driver fined for over-speeding.
1) проводимый эксперимент; 2) грузы, доставленные 2 часа назад; 3) вагон, используемый для перевозки жидких грузов; 4) новые электронные устройства, представленные на выставке; 5) обеспечиваемый минимум обслуживания; 6) переполненный автобус; 7) топливо, используемое в реактивных двигателях; 8) новая станция метро украшенная мрамором и бронзой; 9) принятые меры; 10) водитель, оштрафованный за превышение скорости.

26. My brother started (smoke) last year.
27. Her condition began (grow) worse.
28. It was getting dark and storm clouds were beginning (form), but they continued (walk).
29. After talking about his work he went on (tell) us about his trip to France, which was a great relief for if he had gone on (talk) about his work we would have been bored.
30. The author gives an unfavourable description of the queen's character. Yet then he goes on (say) that she was loved by most of her subjects.
31. The girls went on (giggle) and everybody was beginning (be) annoyed.
32. Do you mean (say) that my father is a liar?
33. I understood that it would mean (tell) the whole truth.
34. I think you should stop (come) late.
35. I don't think Mary ever stopped (think) what people might think about her behaviour.
36. We seldom stop (consider) how few true friends we really have.