填空题

Directions: In this section, you will hear a passage, three times. When the passage is read for the first time, you should listen carefully for its general idea. Then listen to the passage again. When the passage is read for the second time, you are required to fill in the blanks numbered from 36 to 43 with the exact words you have just heard. For blanks numbered 44 to 46 you are required to fill in missing information. For these blanks, you can either use the exact words you have just heard or write down the main points in your own words. Finally, when the passage is read for the third time, you should check what you have written.
Too much sun can cause skin cancer. Too much vitamin D can also make you sick. Yet a study 1 that sunlight and vitamin D may help some people with lung cancer live longer.
Vitamin D helps build strong teeth and 2 . Foods such as oily fish and egg yolks are high in vitamin D. But not many foods 3 are. So extra vitamin D is often 4 to milk products. Some people get more with vitamin products.
Another way is from the sun. Vitamin D is known as the "sunshine vitamin’. The body 5 it through the skin from the ultra-violet radiation of the sun.
Researchers from Harvard University 6 a study of four hundred fifty-six people. These men and women had been 7 for lung cancer. The cancers had been found early. Doctors operated to 8 them.
It was found that those 9 . Others who were operated on in winter had low levels.
10 . Seventy-two percent were still alive after five years. 11 .