单项选择题

What will continue to be ______ it is today--next in importance to oxygen

A．how
B．which
C．what
D．as
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单项选择题
Is it more truly democratic to hold a ______, rather than let the government alone decide an important issue.
A．reincarnation
B．referendum
C．refinery
D．regression
单项选择题
What is vexing the Bush administration and other public-health professionals is the fact that the United States is not particularly well prepared in the event a bird flu pandemic does strike in the near future.
A．tickling
B．encouraging
C．annoying
D．calming
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