题目内容：

Almost everyone suffers from a headache sometimes.But some people suffer from repeated, frequent headaches.

What is headache? What causes it? What can be done about a headache? What research is being done on headaches?

The dictionary defines(下定义) headache simply as “a pain in the head.” What most people mean by headache is a pain which lasts several minutes or hours.It covers the whole head, or one side of it, or perhaps the front or the back of the head.To add to the confusion(困惑) about a definition, some people call tight feeling in the head a headache.

A headache is important because it can be the first warning of a serious condition which probably could be controlled if discovered early.If a person removes the warning, day after day, with a pain-killer, he may pass the point of easy control.

The professional name for covering up a symptom(症状) is “masking” (遮蔽).A headache specialist once said, “Masking symptoms is not the best way of treatment.” He compared taking a pain-killer for a headache before a cause is known with taking iron pills for anemia(贫血症) while bleeding continues undiscovered.He added, “Sometimes it is wiser to stand still than to advance in darkness.”

A headache is important also because it affects normal, happy living.The employee with a headache does less work.In a flash of temper he may upset his fellow workers or customers, causing a direct or indirect loss to his organization.The mother with a headache suffers and disturbs the family.She upsets her husband and children.

1.Which is true according to the passage?

A．Headache has no effect on others.

B．Headache may cover the whole body.

C．Headache may last several minutes or hours.

D．Headache is just the tight feeling in the head.

2.The sentence underlined in Paragraph 5 means ______.

A．you should not advance in darkness whatever happens

B．you’d better do nothing before you know how to deal with it

C．you’d better still stand there without moving when it is dark at night

D．you should take some pain-killers for your headache if you want to cover it up

3.What may the writer talk about in the following paragraph?

A．Treatments of headaches                 B．The definition of headaches

C．Symptom of headaches                   D．Bad effects of a headache

4.The passage mainly tells us______.

A．the reason of headache

B．headache and its effect

C．everyone suffers from a headache

D．a headache is a symptom of something serious