单项选择题

The chairman of the company said that new techniques had _________ improved their production efficiency.

A．violently
B．severely
C．extremely
D．radically
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单项选择题
Because the Appalachian Mountains were difficult to cross, Kentucky was not settled _________ eastern coastal area was.
A．otherwise
B．instead
C．until after
D．in spite of
单项选择题
We should always bear in mind that _________ decisions often result in serious consequences.
A．urgent
B．instant
C．prompt
D．hasty
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