12．Being sociable looks like a good way to add years to your life．Relationships with family，friends，neighbours，even pets，will all do the trick，but the biggest longevity （长寿） boost seems to come from marriage or an equivalent relationship．The effect was first noted in 1858 by William Fair，who wrote that widows and widowers （鳏夫） were at a much higher risk of dying than their married peers．Studies since then suggest that marriage could and as much as seven years to a man's life and two to a woman's．The effect holds for all rouses of death，whether illness，accident or self-harm．
Even if the odds are stacked against you，marriage can more than compensate．Linda Waite from the University of Chicago has found that．I married older man with heart disease can expect to live nearly four years longer than an unmarried man with a healthy heart．Likewise，a married man who smokes more than a pack a day is likely to live as long as a divorced man who doesn't smoke．There's a flip side，however，as partners are more likely to become ill or die in the couple of years following their spouse's death，and caring for a spouse with mental disorder can leave you with some of the same severe problems．
Even so，the odds favour marriage．In a 30-year study of more than 10，000 people，Nicholas Christakis of Harvard Medical School describes how all kinds of social networks have similar effects．
So how does it work？The effects are complex，affected by socio-economic factors，health-service provision，emotional support and other more physiological mechanisms．For example，social contact can boost development of die brain and immune system，leading to better health and less chance of depression？later in life．People in supportive relationships may handle stress better．Then there are the psychological 9 benefits of a supportive partner．
A life partner，children and good friends arc all recommended if you aim to live to 100．The ultimate social network is still being mapped out，hut Christakis says："People are interconnected，so their health
is interconnected．
71．William Fair's study and other studies show thatD．
A．social life provides an effective cure for illness
B．being sociable helps improve one's quality of life
C．women benefit more than men from marriage
D．marriage contributes a great deal to longevity
72．Linda Waite's studies support the idea thatB．
A．older men should quit smoking to stay healthy
B．marriage can help make up for ill health
C．the married are happier than the unmarried
D．unmarried people are likely to suffer in later life
73．It can be inferred from the context that the"Hip side"（Line 4．Para．2）refers toA
A．the disadvantages of being married
B．the emotional problems arising from marriage
C．the responsibility of taking care of one's family
D．the consequence of a broken marriage
74．What does the minor say about social networks？A
A．They have effects similar to those of a marriage．
B．They help develop people's community spirit．
C．They provide timely support for those in need．
D．They help relieve people of their life's burdens．
75．What can be inferred from the last paragraph？B
A．It's important that we develop a social network when young．
B．To stay healthy，one should have a proper social network．
C．Getting a divorce means risking a reduced life span．
D．We should share our social networks with each other．
分析 本文属于说明文阅读，作者通过这篇文章主要向我们描述了研究表明婚姻可以弥补身体不健康带来的不利因素，社交网络也有同样的作用，因此为了保持健康，人们应该有一个适当的社交网络．
解答 71．D．细节理解题．根据第一段提到"but the biggest longevity boost seems to come from marriage or an equivalent relationship．"紧接着就说到"The effect was first noted in 1958 by William Farr，…"．句中的boost和选项D中的contribute有相近的意思，故选择D．
72．B．推理判断题．根据文章Linda Waite举例子说到一个有心脏病的已婚男人可以比未婚但是健康的男人多活4年．因此，婚姻可以弥补身体不健康带来的不利因素，故选B．
73．A．词义猜测题．根据文章flip side的愿意是唱片的另一面，在这里前面已经分析过婚姻的好处，这里指的就是婚姻的反面，故选A．
74．A．细节理解题．根据第二段最后一句…how all kinds of social networks have similar effects可知未成年人认为社交网络有类似于婚姻的影响．故选择A．
75．B．段落大意题．根据文章最后一段提到如果想生活的更长久到100岁，就要发展自己的社交网络，故选B．
点评 考察学生的细节理解和推理判断能力，做细节理解题时一定要找到文章中的原句，和题干进行比较，再做出正确的选择．在做推理判断题不要以个人的主观想象代替文章的事实，要根据文章事实进行合乎逻辑的推理判断．
