单项选择题

Secretary Leavitt stressed ______ in the process of fighting HSN1 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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单项选择题
Some European retailers warned that they would ______, if their stock isn't released soon.
A．close their stores
B．resort to legal action
C．take on a strike
D．take some violent actions
单项选择题
Why are so many Chinese clothes stored in European customs warehouses
A．Because they have exceeded the EU quota limits.
B．Because they are poor in quality.
C．Because they are very expensive.
D．Because they are old-fashione
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