单项选择题

What do many scientists worry about the disease ？（）

A．There is no effective way of treating it.
B．It may spread quickly among birds and poultry.
C．It may affect the world economy and politics.
D．It may change to an epidemic among human beings.

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热门试题

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