All the recent news on AIDS is bad. The death of Rock Hudson【C1】______ public concern about the【C2】______ almost to the point of

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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 that this disease is having a deep impact on our society in a number of ways.
    For one thing, it is【C4】______ financial and other resources. AIDS patients require long term care in hospitals and outpatient facilities. The Center for Disease Control in Atlanta estimates that hospital expenditures 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【C5】______ to $ 6 billion in health care, disability, and lost productivity.
    Private insurers were unprepared for the crisis【C6】______ the invariably fatal disease hits primarily young people. It is becoming increasingly difficult for those in high risk groups to get health and life assurance, and in the absence of private coverage, public funds must be used. 【C7】______, many of the victims are rejected by disapproving or frightened friends and family, without employment , and in need of emotional and psychological support.
    There is also bad news on the medical【C8】______  In spite of a stepped-up research program there is no sign of an【C9】______ breakthrough to a cure. Yet the physicians and others continue to work and to hope. Others not directly involved can help by giving support to public funding for research, hospital and support services. A public【C10】______ to provide care now and an eventual cure for those who suffer is the best response.
【C6】

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,故选A。
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