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There is less _______ on the moon than on the earth.
She's my most ________ worker.
To know the _______ of something is to be able to understand it by considering what is going on around it.
At the end of the project we do a ____________ about our work.
The _________ entered the space ship.
The _____________ was vast.
Astronomy is the _______ of the stars.
_______ is writing that is imagined or made up.
Computer __________ is changing the world.
The ______ crashed into the Earth.
He was an expert in ___________.
_________ is the science of the stars.