单项选择题

A technical innovation is necessary if we want to keep the grain production______.

A．staggering
B．shrinking
C．soaring
D．suspending
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单项选择题
Changing from solid to liquid, water takes in heat from all substances near it, and this ______ produces artificial cold surrounding it.
A．absorption
B．transition
C．consumption
D．interaction
单项选择题
Ms. Green has been living in town for only one year, yet she seems to be______ with everyone who comes to the store.
A．acquainted
B．informed
C．accustomed
D．accepted
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