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
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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
单项选择题
It is not easy to______ lions as they are fierce by nature.
A．attend
B．cultivate
C．tame
D．care
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