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.