How do you use be aware of in a sentence?

Aware:
adjective:
a. knowing or mindful; on one's guard; conscious; informed; alert; knowledgeable

Example sentences:

1. I have always been told to be aware of my surroundings.
2. Be aware that not everything is as it seems.
3. Please be aware of the danger you face if you eat unwrapped candy, this Halloween.
4. Be aware of the fact, that, eating too much candy could cause you to get cavities.
5. Don't forget to be aware of all the trick or treaters out there.