单项选择题

From the passage we know switchgrass is ______.

A．a biochemical product
B．a kind of animal
C．a kind of grass growing very fast
D．a kind of grass growing in a specific soil
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单项选择题
According to David Bransby, ______.
A．President Bush is war-mania
B．bio-based alternative fuels are trvial as compared with the war in Iraq
C．President Bush sh6uld not remedy the loss brought by the two hurricanes
D．bio-based alternative fuels should be treated as important as fighting a war in Iraq
单项选择题
______ is a professor of agriculture.
A．George W. Bush
B．Tom Slunecka
C．James Woolsey
D．David Bransby
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