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.

One of the thieves had the AUDACITY
to quench his thirst...
The Big Bang Theory Season 3, Episode 13

Yeah, and on top of that,
Leonard has the AUDACITY
The Big Bang Theory Season 7, Episode 24