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.

What you are talking about here
is POINTLESS.
Breaking Bad Season 3, Episode 12

And so this conversation is as POINTLESS
as your door-knocking soliloquy?
The Big Bang Theory Season 4, Episode 1

Why would we go to Valhalla
after such miserable and POINTLESS deaths?
Vikings Season 1, Episode 3

Elsie:
That was basically POINTLESS.
Westworld Season 2, Episode 9

A POINTLESS exercise, it seems to me,
but that is option A.
Breaking Bad Season 3, Episode 13