Answer:
When you take away the whole from me there is always some left.
A large oasis in the desert. Come with cash and leave with none.
I have a ring but no fingers. I used to stay still all the time but nowadays I follow you around.
The more it dries the wetter it gets. What is it?
I am owned by Old McDonald.
If I say "everything I tell you is a lie", am I telling you the truth or a lie?