1. I called Mr. Wilson at 9 last night, but he was not at home. He was studying at the library.
2. did not hear the thunder during the storm last night because I was sleeping.
3. sun was shining. The birds were singing.
4. My brother and sister were talking about something when I walked into the room.
5. Tom went to his friends' house, but the boys were not there.
6. The little boy fell asleep while his mother was reading him a story.
7. While it was snowing in Iowa, the sun was shining in Florida.
8. While Ted was shoveling snow from his driveway yesterday, his wife brought him a cup of hot chocolate.
9. John had a car accident last week. He was driving down the street when suddenly a lorry hit his car from behind.
10. Ten years ago, the government decided to begin a food program. At that time, many people in the rural areas were starving due to several years of drought.
11. They were waiting for me when I arrived at the station.
12. She was swimming in the sea when I saw her.
13. They were playing tennis when it started raining.
14. We were driving home from the theatre when the police stopped us.
15. The wind was blowing very hard when I went out this morning