Ex.1.
1. When my father came home, I was having dinner. 2. When Alice returned, I was listening to the radio. 3. When mother entered his room, he was drawing a picture. 4. When my sister came in, I was doing my lessons. 5. When her aunt was airing the room, she caught cold. 6. When I met her, she was going to the office. 7. He was washing his face when somebody knocked at the door. 8. The young people were dancing when I came to the party. 9. When he was washing the dishes, he broke a plate. 10. What were they doing when you saw them?
Ex.2.
1. She cooked yesterday. 2. She was cooking at three o'clock yesterday. 3. She was cooking from two till four yesterday. 4. I wasn't reading at five o'clock.5. I wasn't reading when you came in. 6. What was he doing when I came? 7. What was he doing the whole day yesterday? 8. Pete watered flowers in the garden yesterday. 9. Pete was watering flowers in the garden at five o'clock yesterday. 10. What was Pete doing when I came to see him?
1) Question: Where was the first car manufactured?
Answer: The first car was manufactured in the USA.
2) Question: how many mobile phones have been sold recently?
Answer: Millions of mobile phones have been sold recently.
3) Question: Who was penicillin discovered by?
Answer: Penicillin was discovered by Alexander Fleming.
4) Question: When will the cure for Aids be found?
Answer: Very soon, I hope it will be found soon.
5) Question: When were the first real computers built?
Answer: The first computers were built during the Second World War.