单项选择题

A．up
B．seriously
C．easily
D．over
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单项选择题
Question 28 is based on the following news. At the end of the news item, you will be given 5 seconds to answer the question. Now listen to the news.
A．66
B．12
C．100
D．20
单项选择题
Secretary Leavitt stressed_______ in the process of fighting H5N1 bird flu virus.
A．research and development of new medicine
B．new devices of prevention
C．separation of infectors
D．surveillance and information exchange
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