Pandemic(大面积流行的) H1N1 2009 The most active areas of pandemic influenza transmission currently are in central and eastern Eur

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问题                Pandemic(大面积流行的) H1N1 2009
    The most active areas of pandemic influenza transmission currently are in central and eastern Europe. Focal(集中的) increases in rates during recent weeks were______【51】in at least two eastern European countries. A high intensity of respiratory (呼吸的) disease activity with concurrent (同时存在的) circulation of pandemic influenza still ______【52】in parts of southern and eastern Europe, ______【53】in Greece, Poland, and Ukraine.
    In Western Europe, influenza transmission remains ______【54】and widespread, but overall disease activity has peaked. All influenza viruses in Western Europe were pandemic H1N1 2009, ______【55】, very small numbers or seasonal influenza viru-ses covering less than 1% of all influenza viruses found, were reported in Russia. In ______【56】, limited available data indicate that active, high intensity transmission is occurring in Northern African countries______【57】the Mediterranean coast.
    In Central Asia, limited data______【58】that influenza virus circulation remains active, but transmission may have recently peaked in some places. In West Asia, Israel, Iran, and Iraq also appear to have passed their______【59】period of transmission within the past month though both areas continue to have some active transmission and levels of respiratory disease activity have not yet______【60】to baseline levels. In East Asia, influenza transmission remains active but appears to be______【61】overall. Slight increases in ILI were reported in Mongolia after weeks of declining activity following a large peak of activity______【62】one month ago.
    In North America, influenza transmission______【63】widespread but has declined quickly in all countries. In the tropical regions of Central and South America and the Caribbean, influenza transmission remains geographically widespread but overall disease ______【64】has been declining or remains unchanged in most parts.
    ______【65】for focal increases in respiratory disease activity in a few countries.

选项 A、led
B、brought
C、returned
D、turned

答案C

解析 本题有一定难度, 考查词义辨析, 文章此处是说“……还没有恢复到基本水平”, 答案是C。
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