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.

Unless you're saying
this DOCUMENT was forged.
Game of Thrones Season 4, Episode 8

Just need you to review
and sign this DOCUMENT
The Big Bang Theory Season 9, Episode 18

According to the DOCUMENT you drew up,
the selection of a new takeout restaurant...
The Big Bang Theory Season 4, Episode 21