Mr. Wang was ______ because he was late for work. He is out of work now.
You know great changes _____________ in our school in the past ten years.
Paul doesn’t know _________ about his problems.
--Who _______ the Harry Potter series________ ? -- J.K.Rowling.
We know that about seventy percent _____ the earth _____ covered by water.
The question is _________ .