妈妈给我寄了一张生日贺卡。

My mom sent me a birthday ___card in the mail.

我收到了一张感谢卡。

I received a thank-you ___card.

明天是我朋友的生日，所以我必须给她寄张贺卡。

It's my friend's birthday tomorrow, so I must send her a ___card.