单项选择题

What does the passage mainly discuss

A．The experiments on the common cold.
B．The myths about the common cold.
C．An explanation of why and how people catch colds.
D．The continued spread of the common cold.

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热门试题

单项选择题

According to the passage, there are more myths about the common cold than any other human disease because ______.

A．it spreads more quickly
B．it is the most widespread illness
C．the climate of the world is getting colder and colder
D．few people can catch colds

单项选择题

During the First World War, soldiers who spent long periods in cold and wet trenches ______.

A．often caught colds
B．never caught colds
C．did not show increased tendency to catch colds
D．did not increase in number