单项选择题

According to the author, knowing the cause of the misery will help ______.

A．shorten the duration of the illness
B．the patient buy medicine over the counter
C．the patient obtain cheaper prescription drugs
D．prevent people from catching colds and the flu
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单项选择题
According to the passage, to combat the flu effectively, ______.
A．one should identify the virus which causes it
B．one should consult a doctor as soon as possible
C．one should take medicine upon catching the disease
D．one should remain alert when the disease is spreading
单项选择题
If children have flu-like symptoms, their parents ______.
A．are advised not to give them aspirin
B．should watch out for signs of Reye syndrome
C．are encouraged to take them to hospital for vaccination
D．should prevent them from mixing with people running a fever
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