根据上下文的意思，从方框中选择句子补全对话，使其意思完整。

A. What are you doing? B. Thanks a lot. C. There are beautiful flowers everywhere. D. Which season does she like? E. When's your mother's birthday?

A: Hello, Lucy.

B: I'm making a birthday card.

A: Why?

B: My mum's birthday is coming.

A:

B: It is on July 4th. It is the day after tomorrow.

A:

B: Spring.  She likes flowers very much.

A: You can draw some flowers in the card. Your mother will be happy to see it.

B: Oh, that's a good idea.

A: You're welcome.