I received the booked train ticket a few days before my departure, so I returned the key of the mail box to the Post Office.

在离开的前几天，我总算收到了预订的火车票，于是把信箱的钥匙还给了邮局。

youdao

I received the booked train ticket a few days before my departure, so I returned the key of the mail box to the Post Office.

在离开的前几天，我总算收到了预订的火车票，于是把信箱的钥匙还给了邮局。

youdao