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
With the explosion of population, scientists will have to______ new methods of increasing the world's food supply.
A．do away with
B．put up with
C．come up with
D．go along with
单项选择题
For many years they were able to produce and sell their goods more cheaply than other nations and this gave them a______ advantage in world trade.
A．considerate
B．considerable
C．convenient
D．conservative
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