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.

Hang on, no. My CLIENT does not waive
reading of the charges.
The Big Bang Theory Season 4, Episode 21

Tall and taller, ask him
about his history with my CLIENT.
Breaking Bad Season 5, Episode 11

Gentlemen, I sense you're
discussing my CLIENT. Anything
you care to share with me?
Breaking Bad Season 2, Episode 8

...and loved it so much,
I dived right into The Client.
The Big Bang Theory Season 3, Episode 3

and I thought that your CLIENT,
Robert Downey Jr., would be
The Big Bang Theory Season 7, Episode 14