Complete the second sentence so that it means the same as the first. (Hoàn thành câu sao cho nó có nghĩa giống như câu đầu tiên)
1. While we were having dinner, my dad arrived home.
2. I was trying to sleep when the phone rang.
3. She was climbing up some rocks when she fell.
4. While you were shopping, I tidied your room.
5. The boat hit some rocks as it was sailing towards the shore.