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.

She'd let me sit with her in her CHAMBER
while she sewed
Game of Thrones Season 2, Episode 3

As soon as I touch
the door of that CHAMBER,
Money Heist Season 3, Episode 4

This CHAMBER is needed
for the infectious,
Game of Thrones Season 7, Episode 3

He stole poison from
the Grand Maester's CHAMBER
Game of Thrones Season 4, Episode 6

When a Nazi pulled them off the queue
and they didn’t go to the gas CHAMBER.
Money Heist Season 1, Episode 9