补全对话。A：Is it May now?
B：
A：I like May.
B：
A：Because Mother's Day is in May.
B：
A：It's on the second Sunday in May.
B：
A：I'll make a card. What about you?
B：

A．What will you do for your mum? B．Yes, it is. C．I'll write her a letter. D．When is that? E．Why?