完形填空

　　阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案。

Friends

　　May Be Key to Living Longer Looking for the secret of a long life? Look closely at your friends. New research suggests that having a strong network of friends helps people live longer. "Older people with better social networks of friends were less likely to ______（1）over a 10-year follow-up（随访）period than older people with______（2）friends networks," Lynne C. Giles of Flinders University in Australia told Reuters Health. But in what may come as a surprising finding to older people______（3）rely on their children and other relatives ,having a large network of relatives was not associated with longer life, according______（4）Giles and her colleagues."Of course, that is not to say that social networks______（5）children and other relatives are not important in many other ways," Giles said. Study after study has shown that elderly people who______（6）connected with lots of people tend to live longer lives.______（7）, few studies have examined whether different types of relationships - with friends , partners , children and______（8）relatives - have different effects on longevity（长寿）.Giles's team set out to examine the relationship between various types of social networks and______（9）in a group of almost 1 ,500 Australians who were at least 70 years______（10）. Volunteers answered______（11）about their social networks and then were followed for 10 years. The researchers took into account several factors that could have influenced how long a person lived ,______（12）sex, age, health and smoking status. What the study showed was______（13）older people who reported better social networks of friends were______（14）likely to be alive at the end of the study than people with fewer friends. But relationships with children and other relatives did not have______（15）effect on survival in the study.

　　1 A live B die C work D stay

　　2 A stronger B larger C newer D poorer

　　3 A which B whom C those D who

　　4 A at B to C on D by

　　5 A by B on C of D in 6 A is B are C was D were

　　7 A However B Once C Further D Moreover

　　8 A older B richer C some D other

　　9 A loneliness B longevity C activity D happiness

　　10 A big B long C old D ago

　　11 A doubts B questions C studies D tests

　　12 A taking B including C accepting D offering

　　13 A if B when C this D that

　　14 A less B more C very D most

　　15 A each B every C an D all

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