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.

...for interstellar FLIGHT on a surfboard
when part of my brain...
The Big Bang Theory Season 3, Episode 16

Superman's FLIGHT is a feat of strength.
The Big Bang Theory Season 1, Episode 2

Fine, I'll sit here.
You take FLIGHT and hunt.
The Big Bang Theory Season 2, Episode 20

The fight or FLIGHT instinct
is coded genetically.
The Big Bang Theory Season 4, Episode 2

I think this FLIGHT is coming from Houston.
The Big Bang Theory Season 6, Episode 4