从方框中选择合适的句子，补全对话。

A. Yes, it is. B. That's Children's Day. C. When is your birthday? D. Do you like summer best? E. What will you do for her?

A: Is today August 7^th.

B:

A: Oh, it's my sister's birthday.

B:

A: I'll buy a birthday cake for her.

B: Cool!  

A: It's on June 1^st.

B:

A: Yes!

B:

A: Yes, I do. I can have a birthday party.