回复：回复：Try this

来源: 于 2012-04-05 15:05:57 [旧帖] [给我悄悄话] 本文已被阅读：次

“Please be prepared to show your passport or ID card at the terminal"

A good alternative.  However since you are in the process of moving to "enter" maybe the following is closer to original chinese:

"Please be prepared to show your passport or ID card to enter the terminal".