Every possible means ______to prevent the air pollution, but the sky is still not clear.
What the teacher and the students want to say _____ that either of the countries ____ beautiful.
—— ____ your clothes?——No, mine _____ hanging over there.
In those days John with his classmates _____ kept busy preparing for the exam.
As I have a meeting at four, ten minutes _____ all that I can spare to talk with you.
The writer and singer ______ here.