6. It was evening. My sister was reading a book and I was writing a letter. 2. Katia left the institute, set on a bus and went home. When she came home, her son was doing homework. While he was studying, she was cooking dinner. 8. What were you doing yesterday at this time? I was writing a report at the library. 9. When Ms. Meadows entered the music hall, there were 4th, 5th and 6th classes waiting for her. 10. When she started to sing she was still thinking about Basil's letter. 11. The school director was sitting at her desk, when Ms. Meadows entered her office. 12. When Ms. Meadows came back to the music hall, she was smiling.