Translation of "Briefcase" in Chinese

- I have lost my briefcase.
- I've lost my briefcase.

我把我的手提公文包丢了。

- I left my briefcase in the bus.
- I left my briefcase on the bus.

我把我的公事包留在公車上了。

His briefcase was filled with water.

他的手提包灌滿了水。

My briefcase is full of papers.

我的公事包裡裝滿了文件。

I left my briefcase on the bus.

我把我的公事包留在公車上了。