In the next 40 years , the percentage of people in the United States over the age of 65 is expected to double . __71__the needs of this part of the populations a _72_ to the ingenuity of America . To a _73_ degree , a society is judged by __74_ it cares for those who can no longer care _75_themselves . High technology _76_ the most startling advances in helping the elderly . In _77_ to the well-known artificial heart implantation, there are efforts underway to _78_ artificial lungs , livers , and bones . An electric ear is _ 79_ seventy-five percent effective . The implants will _80_ better medical care by _81_ minute does of drugs into the body continuously . For the older people ,even the simplest tasks can be difficult , _82_ impossible to perform. . American business have responded _83_ their needs with a _84_ of inexpensive but useful _85_ Companies have designed extra-efficient can openers that _86_ people whose hands have become _87_ weak to open cans easily . There are devices that allow people to pull on a pair of socks _88_straining their backs . Combs with long handles and U-shaped back brushes are _89_ for those who can not reach as _90_ as they could when they were young . 71. A) Seeing       B) Meeting      C) Facing      D) Matching 72. A) chance      B) challenge      C) call      D) change 73. A) valuable    B) comprehensive    C) considerate    D) considerable 74. A) how      B) why      C) who      D) whom 75. A) with     B) to      C) upon      D) for 76. A) protects      B) profits      C) proclaims      D) promises 77. A) relation     B) contrast      C) addition      D) proportion 78. A) discover     B) promote      C) assemble      D) develop 79. A) thus      B) still      C) already      D) yet 80. A) permit      B) persist      C) serve      D) pursue 81. A) removing     B)releasing     C) relieving     D) replacing 82. A) always      B) usually      C) eventually      D) sometimes 83. A) to       B) at        C) with        D) on 84. A) set     B) variety     C) series     D) group 85. A)production     B)produce     C) products     D) sales 86. A)enable        B) make       C) cause        D) encourage 87. A) so          B) very          C) too          D) rather 88. A) by        B)without          C) in         D) through 89. A) valuable       B) ready      C) near      D) available 90. A) long         B) good          C) far           D) much