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第6部分：完形填空(第51～65题，每题1分，共15分)
下面的短文有15处空白，请根据短文内容为每处空白确定1个最佳选项。
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(呼吸道) diseases 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) active and widespread, but overall disease activity has peaked. All influenza viruses in Western Europe were pandemic H1N1 2009, ______(55), very small numbers of seasonal influenza viruses, 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.
51. A expected B reported C marked D caused
52. A plays B keeps C maintains D exists
53. A usually B particularly C exactly D completely
54. Ainactive B active C faithful D unaffected
55. A yet B however C still D until
56. A fact B general C total D addition
57. A beside B at C along D around
58. A suggest B advise C propose D recommend
59. A brief B late C long D peak
60. A returned B led C brought D turned
61. A declining B rising C balancing D jumping
62. A above B from C over D since
63. A seems B expands C becomes D remains
64. A picture B performance C quality D activity
65. A except B as C all D and