读一读，选择合适句子完成对话

A. It's cool. B. How about Dalian? C. No, it's not. D. This is Mary. E. What's the weather like in London?

Mary: Hi, Sam!

Sam: Hi, Mary.

Mary: It's hot and sunny. Is it hot?

Sam: No, it isn't. It's 7 degrees.

Mary: 7 degrees? That's a little cold.

Sam: It's 17 degrees, not 7 degrees.

Mary: Oh!