A new ______ to teaching languages is being used here, and it has turned out to be very helpful to the students.
Though I have often heard this song _______. I have never heard you _______ it.
“Why was a special meeting called?” “______ a new chairman.”
Finding her car stolen, _______.
A cook will be immediately fired if he is found _______ in the kitchen.
We looked everywhere for the keys, but they are nowhere _______.