请阅读下面这篇文章，根据所提供的信息，回答5个问题。要求所写答案语法正确、语义完整。

Sam and his sister Susan are chatting online. What are they talking about?

Sam: How are you? I'm in Shanghai. I meet some new friends here. They are very friendly. We are watching boat races. They are interesting. It's 5:00 p.m. People here are leaving work and going home at this moment.

Susan: I think you are having a good time in China. It's 9:00 a.m. in London. We are having breakfast at home. I'm drinking milk. Dad is eating some bread. Mom is eating some vegetables. Our sister Betty isn't with us. She is sleeping in her bedroom.