Most of the people who like films are only interested in the leading actor or actress when they enjoy a film. It seems to them that only the actors or actresses have made the film successful. They always pay attention to their appearance, performance, and fashion. There are many film viewers who have no awareness of the other people’s work to make a film. A finished film is, actually, the result of the collaboration of many people, and the most important among them are the scriptwriter, the cinematographer, the film editor, the actor, and the director. Especially, in some thrilling scenes, the roles of stuntmen are very important. They are always in danger when they are acting; some of them are even badly hurt or dead. But what a pity, many film viewers rarely appreciate their work.

A new study shows that women can reduce their chances of developing heart disease (1) _______ jogging for about three hours every week. The researchers at Harvard Medical University in Boston have just reported the results of the study on the New England Journal of Medicine. The study is the first to show the effectiveness of jogging in the developing of heart disease in women. Only (2) ________ earlier studies have examined the effects of jogging on the heart, but nearly all have been done on men. The new study involves more than 72,000 women between the (3) ________ of forty and sixty-five during a period of eight years. The researchers have found that women (4) ________ jog at least three hours a week have a thirty to forty percent lower chance of owning a heart attack than those who do not.