第6部分：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 ＿＿＿＿＿（51）over a 10-year follow-up （随访） period than older people with ＿＿＿＿＿（52） 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 ＿＿＿＿＿（53） rely on their children and other relatives， having a large network of relatives was not associated with longer life， according ＿＿＿＿＿（54） Giles and her colleagues."

　　Of course， that is not to say that social networks ＿＿＿＿＿（55） children and other relatives are not important in many other ways，" Giles said.

　　Study after study has shown that elderly people who ＿＿＿＿＿（56） connected with lots of people tend to live longer lives. ＿＿＿＿＿（57）， few studies have examined whether different types of relationships - with friends， partners， children and ＿＿＿＿＿（58） relatives - have different effects on longevity （长寿）.

　　Giles's team set out to examine the relationship between various types of social networks and ＿＿＿＿＿（59） in a group of almost 1，500 Australians who were at least 70 years ＿＿＿＿＿（60）. Volunteers answered ＿＿＿＿＿（61） 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，＿＿＿＿＿（62） sex， age， health and smoking status.

　　What the study showed was ＿＿＿＿＿（63） older people who reported better social networks of friends were ＿＿＿＿＿（64） 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 ＿＿＿＿＿（65） effect on survival in the study.

　　51 A die B live C work D stay

　　52 A stronger B larger C poorer D newer

　　53 A which B whom C who D those

　　54 A to B at C on D by

　　55 A by B on C in D of

　　56 A are B is C was D were

　　57 A However B Once C Further D Moreover

　　58 A older B richer C other D some

　　59 A longevity B loneliness C activity D happiness

　　60 A big B long C ago D old

　　61 A questions B doubts C studies D tests

　　62 A including B taking C accepting D offering

　　63 A if B when C that D this

　　64 A more B less C very D most

　　65 A each B every C all D an

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