选择合适的句子，补全对话。

Lily: How are you, Tina? You look so happy.

Tina: Yes, I am very excited (兴奋的).

Lily: It sounds great.

Tina: What's wrong, Lily?

Lily: I lost my favourite watch.

Tina: Let me help you look for your watch. Look!

Lily: Oh, great! Thank you.

A. Don't worry. B. It's under your book. C. You look sad today. D. I'm going to visit the West Lake this weekend. E. Maybe my mother will be angry with me.