If, then, cold and wet have nothing to do with catching colds, why are they more frequent in the winter?Despite the most pains­taking research, no one has yet found the answer. One explanation offered by scientists is that people tend to stay together indoors more in cold weather than at other times, and this makes it easier for cold viruses to be passed on. No one has yet found a cure for the cold. There are drugs and pain suppressors(止痛片)such as aspirin, but all they do is relieve the symptoms (症状).

1.The writer offered examples to support his argument.

A.4 B.5 C.6 D.3

2.Which of the following does NOT agree with the chosen passage?

A.The Eskimos do not suffer from colds all the time.

B.Colds are not 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 has one.

3.Arctic explorers may catch colds when .

A.they are working in the isolated arctic regions

B.they are writing reports in terribly cold weather

C.they are free from work in the isolated arctic regions

D.they are coming into touch again with the outside world

4.Volunteers taking part in the experiments in the Common Cold Research Unit .

A.suffered a lot B.never caught colds

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