Lesson 5: 在邮局 At the post office.

往伦敦寄一封信，贴多少封信？
->How much is a stamp to send letter to London?

你寄平信还是寄挂号信.
-> Ordinary or registered mail ？

我寄航空挂号信？
-> Register mail by plane, please.

要贴四块的邮票。
-> Four yuans, please.