阅读下面短文，在空白处填入一个适当的单词或括号内单词的正确形式

Almost everyone suffers from a headache 【小题1】 (occasional). But some people suffer from repeated frequent headaches.

What is headache? What causes it? What can you do about a headache? What research is being done on headaches? The dictionary defines headache simply【小题2】 "a pain in the head".【小题3】 most people mean by headache【小题4】(be)a pain that 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 about definition, some people call'" tight feeling in the head" a headache.

A headache is important because【小题5】 can be the first warning of a serious condition which probably could be controlled when【小题6】( discover) early. If person【小题7】(remove) the warning, day after day, with a pain-killer, he may pass the point of easy control.

A headache is important also because it disturbs people, 【小题8】(prevent)them from living a happy life. The【小题9】(employ) with headache does less work. In a flash of temper he may upset his fellow 【小题10】 (guy) or customers, causing direct or indirect loss to his organization. The mother with a headache suffers and disturbs the family. She upsets her husband and children.