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.

it's CLEAR now,
The Big Bang Theory Season 5, Episode 18

The way ahead is CLEAR.
Game of Thrones Season 5, Episode 10

Now, be CLEAR.
This is an end game,
if you get my meaning.
Breaking Bad Season 4, Episode 4

I thought Flynn made that CLEAR.
Breaking Bad Season 5, Episode 16

There's only one CLEAR choice.
The Big Bang Theory Season 10, Episode 19