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第6部分：完形填空（第51～55题，每题1分，共15分）
下面的短文有15处空白，请根据短文内容为没出天空确定一个最佳选项。
Happy Marriage， Happy Heart
Happily married people have lower blood pressure （51） unhappily married people or singles， a Brigham Young University study says.
On the other （52） ， even having a supportive social network did not translate into a blood pressure benefit for singles or unhappily married people， according to the study.
There seems to be some unique health benefits from marriage. Its not just being married （53） benefits health - whats really the most protective of health is having a （54） marriage， study author Julianne Holt-Lunstad， a psychologist who specializes in relationships and health， said in a prepared statement.
The study included 204 married and 99 （55） adults who wore portable blood-pressure monitors for 24 hours. The （56） recorded blood pressure at random intervals and provided a total of about 72 readings.
We wanted to capture participants blood pressure doing whatever they normally （57） in everyday life. Getting one or two readings in a clinic Js not really （58） of the fluctuations （波动） that occur throughout the day Holt-Lunstad said.
Overall， happily married people scored four points （59） on the blood pressure readings than single adults. The study also found that blood （60） among married people， especially those in happy marriages， （61） more during sleep than in single people.
Research has shown that people whose blood pressure remains high throughout the night are at （62） greater risk of heart disease than people whose blood pressure drops， Holt-Lunstad said.
The study was published in the March 20 （63） of the journal Annals （年刊） of Behavioral Medicine.
The study also found that unhappily married adults have higher blood pressure than both happily married （64） single adults.
Holt-Lunstad noted that married couples can encourage healthy habits in one （65） ， such as eating a healthy diet and having regular doctor visits. People in happy marriages also have a source of emotional support， she said.
51 A from B to C than D by
52 A turn B coin C hand D part
53 A which B that C this D what
54 A happy B long C sad D short
55 A young B old C single D experienced
56 A monitors B doctors C nurses D researchers
57 A take B do C make D want
58 A supportive B active C protective D representative
59 A faster B lower C higher D slower
60 A pressure B speed C level D flow
61 A stopped B dropped C rose D occurred
62 A more B some C much D any
63 A page B number C copy D issue
64 A and B or C nor D also
65 A another B each C other D every