联系上下文,补全对话。
A: ___________ your birthday ___________ March, Helen?
B: No, it's not.
A: ___________ is your ___________?
B: It's in April.
A: ___________ has a ___________ in March?
B: My grandma.
A: ___________ the ___________?
B: It's March 13th. Let's make a ___________ card for her.
A: ___________ idea.