In the next 40 years the percentage of people in the United States over the age of

　　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