单项选择题

She was ______ her brains to remember the man's time, but her bad memory failed her.

A．hitting
B．beating
C．racking
D．exhausting
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There is no known cure for SARS, but doctors are developing ways to help sufferers ______ it.
A．retard
B．eliminate
C．dispense
D．handle
单项选择题
These technological advances in communication have ______ the way people do business.
A．revolted
B．represented
C．adopted
D．transformed
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