题目内容：
按要求，完成填空：Many people wrongly believe that when people reach old age, their families place them in nursing homes. They are left in the 11 of strangers for the rest of their lives. Their growing chil-dren visit them only occasionally, but more often, they do not have any 12 visitors. The truth is that this idea is an unfortunate myth and imaginary story. In fact, family members provide over 80 percent of the care that elderly people neeD． Samuel Preston, a sociologist, studied 13 the American family is changing. He reported that by the time the average American couple reaches 40 years of age, they have more parents than children. 14 , because people today live longer after an illness than people did years 15 , family members must provide long term care. More psy-chologists have found that all caregivers share a common characteristic: all caregivers believe that they are the best 16 for the joB． In other words, they all felt that they 17 do the job better than anyone else. Social workers 18 caregivers to find out why they took on the responsibility of caring for an elderly relative. Many caregivers believed they had 19 to help their relative. Some stated that helping others made them feel more useful. Others hoped that by helping someone now,they would deserve care when they became old and 20 . Caring for the elderly and being taken care of can be a mutually satisfying experience for everyone who might be involved．
A．hands
B．arms
C．bodies
D．homes
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