读一读，选择合适的句子补全对话。

A. When is your birthday? B. What about you? C. What are you doing? D. That's Tree Planting Day. E. Because spring is beautiful.

Susan: Hello, Lucy.

Lucy: Look! I'm drawing a picture about summer.

Susan: Cool! It's so nice.

Lucy: Summer is my favourite season.

Susan: My favourite season is spring.

Lucy: Why?

Susan:And my birthday is in spring, too.

Lucy:

Susan: It's on March 12th.

Lucy: Wow!

Susan: Yes, I like that day.