Answer:
A large oasis in the desert. Come with cash and leave with none.
What do you get when you mix lemons with gun powder?
I belong to you but others use me more often than you do. What am I?
I am tomorrow's yesterday and yesterday's tomorrow. What am I?
I rise and fall no matter what, only at finals rest do I not budge. What am I?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.