单项选择题

Most of corn and wheat is______________.

A．sold to feed people
B．exported to foreign countries
C．sold to fatten cattle and pigs
D．sold as food
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单项选择题
Farming in Middle West is favorable chiefly because__________.
A．it's technology-intensive
B．it's labor-intensive
C．weather conditions there are very good
D．natural sources there are very good
单项选择题
The man who _________________ taxes in the area was charged with bribery by the police.
A．received
B．collected
C．gathered
D．accumulated
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