题目内容：
共用题干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 _________( 5 1 ) 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 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 transmis-
sion 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 re-
mains 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:reported
B:expected
C:marked
D:caused
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