All the recent news on AIDS is bad. The death of Rock Hudson【C1】______public concern about the【C2】______almost to the point of p

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问题     All the recent news on AIDS is bad. The death of Rock Hudson【C1】______public concern about the【C2】______almost to the point of panic. Now general concern is【C3】______not so much on personal risk but on the growing realization【C4】______this disease is having a deep impact【C5】______our society in a number of ways.
    For one thing, it is【C6】______financial and other resources. AIDS patients require long-term care in hospitals and out patient【C7】______. The Center for Disease Control in Atlanta estimates that hospital【C8】______for the first 10,000 AIDS patients were about $1.4 billion. The total economic cost to the nation of AIDS cases is estimated to【C9】______to $ 6 billion in health care, disability, and lost【C10】______.
    Private insurers were unprepared for the crisis【C11】______the invariably fatal disease hits primarily young people. It is becoming increasingly【C12】______for those in high risk groups to get health and life assurance, and in the【C13】______of private coverage, public funds must be used【C14】______, many of the victims are【C15】______by disapproving or frightened friends and family, without employment, and【C16】______need of emotional and psychological support.
    There is also bad news on the medical【C17】______. In spite of a stepped-up research program there is no sign of an【C18】______breakthrough to a cure. Yet the physicians and others continue to work and to hope. Others not directly【C19】______can help by giving support to public funding for research, hospital and support services. A public【C20】______to provide care now and an eventual cure for those who suffer is the best response.
【C11】

选项 A、since
B、unless
C、until
D、before

答案A

解析 since“既然”,引导原因状语从句;unless“除非”,引导条件状语从句;until“直到”,常和not连用;before“在……之前”,引导时间状语从句。从逻辑关系上看,此处应填入表示原因的词,故答案选A。
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