补全对话
A. It's on January 10th.
B. Because my birthday is in January.
C. When is her birthday?
D. My mother's birthday is in January, too.
Mary: January is a special month.
Tom: Why?
Mary:
Tom: When is your birthday?
Mary: And my grandmother's birthday is on January 5th.
Tom: That's fine.
Mary:
Tom:
Mary: It's on January 18th.