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.

They learned to COPY a mind...
Westworld Season 2, Episode 7

To this day,
I still get a monthly COPY
The Big Bang Theory Season 7, Episode 17

This is
the very COPY
The Big Bang Theory Season 7, Episode 6

So that Delos
can COPY them.
Westworld Season 2, Episode 7

You're sure this is the only COPY
in Winterfell?
Game of Thrones Season 7, Episode 5