根据对话内容与上下文，在空白处填入适当的句子，使对话意思完整。
A: Hi, Tom! Come in, please.
B: Hi! ____________________________________________________________? (1)
A: I'm looking for information about Sydney on the Internet. I'm going to Sydney for my holiday.
B: _______________________________________________________________? (2)
A: No, but my father has been there twice. He told me there were many places of interest there.
B: _______________________________________________________________? (3)
A: I'm leaving at 9 a.m on Friday, July.
B: _______________________________________________________________? (4)
A: I will go there by plane. B: Have you ever flown in a plane?
A: _______________________________________________________________. (5)
B: You must be excited when you fly in a plane.
A: Really, I can't for it.
pC(g)处于平衡状态(已知n+m＞p，△H>0）。完成以下问题（填写：增大、减小、不变、不确定）