Answer:
What can be white and yellow at the same time?
You might accuse someone living with a stolen identity of being this.
Doing this with your job can be risky but doing it with smoking is always a good idea
What is something yet nothing, but if you fill it up it will disappear?
When will water stop running down hill?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.