单项选择题

People should stay away from caffeine after lunch because

A．its effect may linger for almost 10 hours.
B．it disturbs the way people feel in daytime.
C．it accelerates heartbeat and respiration.
D．they may want to take a catnap.
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Which category of writing does the passage belong to
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C．Persuasion.
D．Exposition.
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Numerous foreign talented engineers, scientists and entrepreneurs are attracted to Silicon Valley to do all of the following EXCEPT
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