Answer:
What goes up when rain comes down?
What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?
What sevenletter word becomes longer when the third letter is removed?
If you are unsure how to use one then just ask a flight attendant.
If you have me, you want to tell me. If you tell me, you don't have me.
What is always coming but never arrives?