Answer:
Some will use me, others not. Some have remembered, others forgot. For profit or gain, I'm used expertly. I can't be picked off the ground or tossed into the sea. What am I?
What is black when it's clean and white when it's dirty?
I can fall off a building and live but in water I will die.
I am the only thing that place today before yesterday. (one word)
What gets wetter as it dries?
What language does a billboard speak?
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic