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.

Come on, you didn't
seriously expect him to REACT
The Big Bang Theory Season 12, Episode 23

Okay? l knew you would
REACT this way.
Breaking Bad Season 4, Episode 9

I think I didn’t REACT as she expected.
Money Heist Season 1, Episode 12

how to REACT to this story.
The Big Bang Theory Season 12, Episode 20

...how Sheldon would REACT
if the TARDIS was at your place.
The Big Bang Theory Season 8, Episode 19