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.

But as delicious
as the APPETIZER might be...
The Big Bang Theory Season 2, Episode 12

Our standard order is,
the steamed dumpling APPETIZER...
The Big Bang Theory Season 1, Episode 7

No, those shitty thin chocolate sticks:
neither a snack nor an APPETIZER.
Money Heist Season 3, Episode 2