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.

Yeah, herbal TEA for me, please.
The Big Bang Theory Season 2, Episode 20

I slipped it into that stevia crap
that you're always putting in your TEA.
Breaking Bad Season 5, Episode 16

What kind of TEA would you like?
The Big Bang Theory Season 6, Episode 5

No, I don't want TEA.
The Big Bang Theory Season 5, Episode 17

Can I invite you
in for TEA?
The Big Bang Theory Season 7, Episode 7