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.

to a VET right now.
I don't have a VET.
The Big Bang Theory Season 7, Episode 15

a dermatologist, a urologist.
You'd think I'd have a VET.
The Big Bang Theory Season 7, Episode 15

If you're really worried, we'll take him
to a VET and have him tested.
The Big Bang Theory Season 9, Episode 15

to a VET right now.
I don't have a VET.
The Big Bang Theory Season 7, Episode 15

and that she's a VET.
The Big Bang Theory Season 7, Episode 15