(57)

(66)

(67)

(65)

(64)

Most of us, however, take life for granted. We know that one day we must die, but usually we picture that day as far in the future. When we are in buoyant health, death is all but unimaginable. We seldom think of it. [63.The days stretch out in an endless vista. So we go about our petty task, hardly aware of our listless attitude toward life.]The same lethargy, I am afraid, characterizes the use of all our faculties and senses. [64.Only the deaf appreciate hearing, only the blind realize the manifold blessings that lie in sight.]Particularly does this observation apply to those who have lost sight and hearing in adult life. [65.But those who have never suffered impairment of sight or hearing seldom make the fullest use of these blessed faculties.][66.Their eyes and ears take in all sights and sounds hazily, without concentration, and with little appreciation.] It is the same old story of not being grateful for what we have until we lose it, of not being conscious of health until we are ill. I have often thought it would be a blessing if. each human being were stricken blind and deaf for a few days at some time during his early adult life. Darkness would make him more appreciative of sight; silence would teach him the joys of sound. Now and then I have tested my seeing friends to discover what they see. Recently I was visited by a very good friend who had just returned from a long walk in the woods, and I asked her what she had observed. “Nothing in particular.” She replied. [67.I might have been incredulous had I not been accustomed to such responses, for long ago I became convinced that the seeing see little.]

(From Three Days to See)

（63）

Why does the author state that the family is a co-operative enterprise according to the passage?

(60)

What are psychiatrists, psychologists, social workers, and specialists on the family aware of in Passage Four?

(59)

(57)