The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

that's the last day of my CAREER,
all right?
Breaking Bad Season 5, Episode 10

A fitting swan song
to your CAREER as a waitress
The Big Bang Theory Season 7, Episode 13

He's enjoyed a distinguished
military CAREER.
Game of Thrones Season 6, Episode 4

and kept me up all night and
I've got no CAREER and no future
The Big Bang Theory Season 5, Episode 12

...and I assumed my CAREER would
continue on that upward trajectory.
The Big Bang Theory Season 8, Episode 6