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.

You have a REMARKABLE brain.
The Big Bang Theory Season 2, Episode 15

...that your son had
such a REMARKABLE mind?
The Big Bang Theory Season 8, Episode 23

Remarkable.
The Big Bang Theory Season 4, Episode 21

...but I experienced an unanticipated
and REMARKABLE release of endorphins.
The Big Bang Theory Season 2, Episode 15

Remarkable.
The Big Bang Theory Season 5, Episode 12