I wrote a letter of thanks to my teacher.
我写了一封感谢信给我的老师。
He received a letter of thanks from a client.
他收到了一封来自客户的感谢信。
He wrote a letter of thanks to his teacher.
他写了一封感谢信给他的老师。
She decided to write a letter of thanks to the hospital.
她决定给医院写一封感谢信。
A letter of thanks was drawn up.
感谢信写好了.
It's courteous of you to write a letter of thanks to me.
你实在是太客气了,还写了一封感谢信给我。

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