单项选择题

Which of the following symptoms will distinguish the flu from a cold

A．A stuffy nose.
B．A high temperature.
C．A sore throat.
D．A dry cough.
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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
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 drags
D．prevent people from catching colds and the flu
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