1 was blowing, we were...
2 were leaving, arrived
3 was traveling, got
4 was raining
5 entered, was sitting
6 was working
7 were having, came
8 was getting, was reading
1 was 2 was riding 3 have been 4 watched 5 played 6 were playing 7 started 8 did not finish 9 were talking 10 had read 11 have read
1. We are riding on a bike now
Are we riding on a bike now?
2. It is raining now
Is it raining now?
3. I am waiting for you on the street
Am I waiting for you on the street?
1. Walking along the street I saw several destroyed houses.
2. It was an exciting incident. No wonder she spoke about it in an excited voice.
3. Sitting near the fire, he felt very warm.
4. Having found a hotel, we looked for somewhere to have dinner.
5. The frightened child could not sleep all night – so frightening was the tale.
6. Being unemployed, he hasn’t got much money.
7. I don’t know what was in the burnt letter. I didn’t read it.
8. Looking out of the window, he saw his mother watering the flowers.
9. The house surrounded by tall trees was very beautiful.
10. The wall surrounding the house was very high.
11. Translated by a good specialist, the story preserved all the humour of the original.
12. Selling fruit, he looked back from time to time, hoping to see his friends.
13. Having sold all the fruit, he went to see his friends.
14. Entering the room, she turned on the light.
15. Having arrived late, we missed the train.
16. Jim hurt his arm while playing tennis.
17. The lost book was found at last.
18. Not wishing to discuss that problem, he changed the conversation.
19. A word spoken in time may have very important results.
20. The students speaking<span> good English must help their classmates.
</span>
Ответ:
Environmental problems have become one of the most urgent problems of modern society. More and more people suffer from air and water pollution. If everybody starts caring about the planet we live on, many environmental problems can be solved. For example, if we start recycling paper and cardboard, we can save lots of trees. The most important thing is, of course, to start acting immediately, otherwise we might have to face many global disasters.
Проблемы окружающей среды стали одной из самых насущных проблем современного общества. Всё больше людей страдает от загрязнений воды и воздуха. Если все начнут заботиться о планете, на которой живут, многие экологические проблемы могут быть решены. Например, если мы начнём утилизировать бумагу и картон, мы спасём многие деревья. Если мы начнём использовать больше общественный транспорт, чем личные автомобили, у нас будет менее загрязнён воздух. Самое важное, конечно же, начать действовать сейчас, или нам придётся столкнуться со многими глобальными катастрофами.
Объяснение: