从方框中选出句子补全对话，只填序号。

A. What do you do on that day in the UK? B. I'm reading a book about seasons in the world. C. It's on July 14th. D. Which season do you like best? E. We have Children's Day in London, too.

A: Hi, Lu Yao! What are you doing?
B: Hello, Amy!
A: Well. 
B: Summer. Because Children's Day is in it. On that day, we usually have a party and enjoy some shows in the school.
A: Sounds great!
B: Really? When is it?
A:
B: Amazing! We have summer vacation in July!
A:
A: On that day, our parents often come to school and we have a charity sale for poor people, including toys, books, pictures and food.
B: You're helpful!