单项选择题

As a developing country, we must keep______ with the rapid development of the world economy.

A．move
B．step
C．speed
D．pace
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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
Before using your new pressure cooker, read the following______ carefully.
A．publications
B．instructions
C．announcement
D．advertisement
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