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.

A ridiculous ARRANGEMENT, to my mind.
Game of Thrones Season 3, Episode 4

You tell us something and then, well,
we’ll see, we’ll come to some ARRANGEMENT.
Money Heist Season 1, Episode 8

That seems a fairly efficient ARRANGEMENT.
The Big Bang Theory Season 2, Episode 15

Arrangement?
Game of Thrones Season 7, Episode 5

is getting the worst of this ARRANGEMENT.
Game of Thrones Season 3, Episode 6