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.

Expedition north?
Game of Thrones Season 7, Episode 7

Hang on, let's talk about it. This is a
National Science Foundation EXPEDITION.
The Big Bang Theory Season 2, Episode 23

Which I respect,
but you would not help us on this EXPEDITION.
Game of Thrones Season 5, Episode 10

Listen, I don't know if I can go
on the EXPEDITION.
The Big Bang Theory Season 2, Episode 23

...on the NSF EXPEDITION
to the Arctic Circle.
The Big Bang Theory Season 2, Episode 23