He _____ for ten years but still doesn’t want to leave office[ ]

We are in _______.

The victim was last seen ______ his office at 7 p.m.

________ parents may have a stronger desire to see their children step into the world of ________.[ ]

Though great progress has been made in astronomy in the past fifty years, ______ still much that remains mysterious to astronomers _______ the universe, even the solar system [ ]