Directions:In this section of the test,there are ten paragraphs.Each of the paragraphs is followed by an incomplete phrase or sentence which summarizes the main idea of the paragraph.Spell out the missing letters of the word on your Answer Sheet.
Paragraph Eight
The elderly who have positive views of aging live about seven and a half years longer than those who have negative views of aging.They are less likely to have dementia as well as some of the markers of Alzheimer's disease.They're more likely to take care of themselves better.
43.People's views play a r______ in longevity.
【正确答案】：role
