Passport and Boarding Pass, please.

请出示护照和登机牌。

Here's your ticket back, and here's your boarding pass.

这是你的机票，这是你的登机卡。

May I see your boarding pass?

能看一下您的登记牌吗？

Where did I put my boarding pass?

我的登记证放在那里了？

May I see your boarding pass, Sir?

先生，我可以看一下您的登记牌吗？