Quest 3. Вставь правильную форму глагола в Past Simple или Past Continuous

Quest 3. Вставь правильную форму глагола в Past Simple или Past Continuous

1. While I was reading (read) a book, my brother was watching (watch) TV.
2. She was cooking (cook) dinner when the phone rang (ring).
3. They were walking (walk) home when it suddenly started (start) to rain.