根据所给对话及情景完成下列对话，每空填一句。
Mary: Hi, Tom! Come in, please.
Tom: Hi! 1______?
Mary: I'm looking for information about Sydney on the Internet.I'm going to Sydney for my holiday.
Tom: Aren't you lucky! 2______?
Mary: No, but my father has been there twice. He told me there were many places of interest there.
Tom: 3______?
Mary: I'm leaving at 9 am on Tuesday, July 4th.
Tom: 4______?
Mary: Of course.
Tom: Have you ever flown in a plane?
Mary: 5______.
Tom: You must be excited when you fly in a plane.
Mary: Really? I can't wait for it.
