单项选择题

Despite efforts to eradicate it, corruption persists, though it doesn't ______.

A．speed
B．hasten
C．accelerate
D．boost
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单项选择题
An increasing proportion of our population, unable to live without advanced medical ______, will become progressively more reliant on expensive technology.
A．interference
B．intrusion
C．intervention
D．interaction
单项选择题
It's self-evident that no one would have time to know everything going on in the world.
A．there is
B．as is
C．it is
D．what is
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