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.

I'm the BORING thing
you're choosing
The Big Bang Theory Season 7, Episode 23

Oh, boy, that's one of those jobs
that's BORING, BORING, BORING,
The Big Bang Theory Season 9, Episode 10

I hear you're reading a BORING book.
Game of Thrones Season 1, Episode 4

Not BORING at all.
Breaking Bad Season 5, Episode 10

Are you that BORING?
Breaking Bad Season 3, Episode 11