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.

What did work was, "How'd you like to visit
a secret GOVERNMENT facility?"
The Big Bang Theory Season 2, Episode 8

...and selling it to the GOVERNMENT.
The Big Bang Theory Season 4, Episode 9

and, oh, I've just gotten
a big GOVERNMENT grant
The Big Bang Theory Season 5, Episode 13

Wow, working on a top-secret
GOVERNMENT project,
The Big Bang Theory Season 10, Episode 22

BANK OF SPAIN HEIST
SIERRA INCRIMINATES GOVERNMENT
Money Heist Season 4, Episode 8