The outbreak of swine flu that was first detected in Mexico was declared a global epidemic on June 11 , 2009. It is the first wo

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问题     The outbreak of swine flu that was first detected in Mexico was declared a global epidemic on June 11 , 2009. It is the first worldwide epidemic【B1】______by the World Health Organization in 41 years.
    The heightened alert【B2】______an emergency meeting with flu experts in Geneva that assembled after a sharp rise in cases in Australia, and rising【B3】______in Britain, Japan, Chile and elsewhere.
    But the epidemic is"【B4】______"in severity, according to Margaret Chan, the organization’s director general ,【B5】______the overwhelming majority of patients experiencing only mild symptoms and a full recovery, often in the【B6】______of any medical treatment.
    The outbreak came to global【B7】______in late April 2009, when Mexican authorities noted an unusually large number of hospitalizations and deaths【B8】______healthy adults. As much of Mexico City shut down at the height of a panic, cases began to【B9】______in New York City, the southwestern United States and around the world.
    In the United States, new cases seemed to fade【B10】______warmer weather arrived. But in late September 2009, officials reported there was【B11】______flu activity in almost every state and that virtually all the【B12】______tested are the new swine flu, also known as (A) H1N1 , not seasonal flu. In the U. S. , it has【B13】______more than one million people, and caused more than 600 deaths and more than 6, 000 hospitalizations.
    Federal health officials【B14】______Tamiflu for children from the national stockpile and began【B15】______orders from the slates for the new swine flu vaccine. The new vaccine, which is different from the annual flu vaccine, is【B16】______ahead of expectations. More than three million doses were to be made available in early October 2009, though most of those【B17】______doses were of the FluMist nasal spray type, which is not【B18】______for pregnant women, people over 50 or those with breathing difficulties, heart disease or several other【B19】______. But it was still possible to vaccinate people in other high-risk groups; health care workers, people【B20】______infants and healthy young people.
【B8】

选项 A、over
B、for
C、among
D、to

答案C

解析 本题考查考生对介词词义的掌握。很多考生认为介词属于英语中非主流的“小词”,其实介词在英语中使用频率很高,因为它们可以表现形形色色的语义衔接以及语法关系和逻辑关系。如本题中的的选项[A]over可以表示“穿越;胜过;因为”,选项[B]for可以表示“由于;为了;支持”,选项[C]among表示“围绕;在……之中”,选项[D]to表示“方向;目的;针对”等。本句指全球之所以关注这一流感是由于墨西哥政府注意到健康人群中有大批感染此病而住院甚至死亡的病例,所以选项[C] among可以表示这种群体关系,为正确答案。
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