单项选择题

Which of the following agrees with the chosen passage

A．The Eskimos do not suffer from colds all the time.
B．Colds are caused by cold.
C．People suffer from colds just because they like to stay indoors.
D．A person may catch a cold by touching someone who already had one.
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单项选择题
The passage mainly discusses ______.
A．the experiments on the common cold
B．the fallacy about the common cold
C．the reason and the way people catch colds
D．the continued spread of common colds
单项选择题
Volunteers taking part in the experiments in the Common Cold Research Unit ______.
A．suffered a lot
B．never caught colds
C．often caught colds
D．became very strong
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