I'll send a registered letter.

我要寄封挂号信。

Postage of a registered letter

一个挂号信的邮资

Here id a registered letter for you.

这儿有你一封挂号信。

How much does it cost to mail a registered letter to China?

寄往中国的挂号信要多少钱?

A man called at a village post-office for a registered letter.

一个人来到乡村邮局取挂号信。

Would it be better to get a money order or send it in a registered letter?

用邮政汇票好还是用保价信寄钞票好?

This time it was the postman and he wanted me to sign for a registered letter！

这次是邮递员，他要我签收一封挂号信！

Sent me a registered letter, I guess she has something important to tell me.

我妈给我发了一封挂号信，我想她有什么重要。