Ответ: 1. When we got off the train it (was raining) heavily.
2. The summer of that year was cold. It often (rained).
3. The weather was foggy. Cars and buses (were moving) slowly.
4. While I (was packing) my things, he (rang) up for a taxi to take me to the station.
5. The house was quiet. The boys (were playing) chess and Mary (was reading) a book.
6. When did you (see) him last?
7. I (bought) this guide book in London.
8. In 1990 he (was) in Siberia with a group of volunteers. They (were making trails) in one of the national parks there.
9. Who (was speaking) over the phone at five o’clock yesterday. I couldn’t get through for an hour.
10. The whole family (was watching) a detective film on TV when I (came) home.
11. I (looked) into the window and (saw) an old woman (sitting) by it. The picture (took) me back to my childhood.
12. Ships (travelled) from Southampton to New York in four or five days in those times.
13. I (called) the dog but it would not come. It (was digging) something at the far end of the garden.
14. It was hot and stuffy. I (was driving) to my parents’ house. I (turned) on the air-conditioning but it did not (work).
15. When I (was going) down the library steps I (saw) that my friends waiting for me across the street.