他上周提交了正式的辞职信。

He submitted his formal ___letter ___of ___resignation last week.

我昨天递交了辞呈。

I ___handed ___in ___my ___resignation yesterday.

经过深思熟虑，她最终提交了辞职信。

After much deliberation, she finally submitted her ___letter ___of ___resignation.