In Paragraph 3 the phrase his need refers to__
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In Paragraph 3,the phrase "this need" refers to________.
A.the need to prolong the lives of old people
B.the need to enrich the life of the retired people
C.the need to build profit-making nursing homes
D.the need to take care of a sick and weak person
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答案：D
第三段第三句：" Today , with most members of a household working or in school , there is often no one at home who can care for a sick or weak person.（现在，由于大多数的家庭成员都在工作或上学，所以常常没有人在家照顾生病或身体虚弱的人。）”因此，选项D 是正确答案。