I was deep in thought, so I didn't notice _____.
Finding information in today’s world is easy. The _____ is how you can tell if the information you get is useful or not.
Mrs. White showed her students some old maps _____ from the library.
The teacher always tells her students that only if _____ hard ____ achieve success.
Obviously the measures taken by the local government have _____ the solution to drinking water problems in this region.
Could you drive me to the bookstore at noon if _____?