单选题 .  Many people wrongly believe that when people reach old age, their families place them in nursing homes. They are left in the     1    of strangers for the rest of their lives. Their     2    children visit them only occasionally, but more often, they do not have any     3    visitors.
    The truth is that this idea is an     4    story. In fact, family members provide over 80 percent of the care     5    elderly people need. Samuel Preston, a sociologist, studied     6    the American family is changing. He reported that by the time the     7    American couple reaches 40 years of age, they have more parents than children.     8    , because people today live longer after an illness than people did years     9    , family members must provide long term care.
    More psychologists have found that all caregivers     10    a common characteristic: All caregivers believe that they are the best     11    for the job. In other words, they all felt that they     12    do the job better than anyone else. Social workers     13    caregivers to find out why they took     14    the responsibility of caring for an elderly relative. Many caregivers believed they had a (n)     15    to help their relative. Some stated that helping others     16    them feel more useful. Others hoped that by helping     17    now, they would deserve care when they became old and     18    . Caring for the elderly and being taken care of can be a     19    satisfying experience for everyone who might be     20    .1.