Most of us take life 1 granted. We know that one day we must die, but usually we picture that day as far in the future. When we are in good health, death is all but 2 . We seldom think of it. The days 3 out endlessly. So we go about our petty tasks, 4 aware of our listless attitude towards life. The same listlessness, I am afraid, 5 the use of all our faculties and senses. Only the deaf appreciate hearing, only the 6 realize the blessings that lie in sight. Particularly 7 this observation apply to those who have lost sight and hearing in adult life. But those who have never suffered loss of sight or hearing damage seldom make the 8 use of these blessed faculties. Their eyes and ears take in all sights and sounds hazily, 9 concentration, and with little appreciation. It is the same old story of not being grateful for what we have 10 we lose it, of not being conscious of health until we are ill. A) characterizes B) bound C) does D) owe E) fullest F) without G) relaxing H) hardly I) proposed J) unimaginable K) until L) unless M) for N) blind O) stretch