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篇一：A Special Clock
Every living thing has what scientists call a biological clock that controls behavior. The biological clock________(51) plants when to form flowers and when the flowers should open. It tells insects when to __________(52) the protective cocoon (防護卵袋) and fly away, and it tells animals and human beings when to eat, sleep and wake.
Events outside the plant and animal__________(53) the actions of some biological clocks . Scientists recently found, for example, that a tiny animal changes the color of its fur because of the __________(54) of hours of daylight. In the short_________(55) of winter, its fur becomes white. The fur becomes gray brown in _________(56) in the longer hours of daylight in summer.
Inner signals control other _________(57) clocks. German scientists found that some kind of internal clock seems to order birds to begin their long migration_________(58) twice each year. Birds _________(59) from flying become restless when it is time for the trip, _________(60) they become calm again when the time of the flight has ended.
Scientists say they are beginning to learn which _________(61) of the brain contain biological clocks. An American researcher, Martin Moorhead, said a small group of cells near the front of the brain__________(62) to control the timing of some of our actions. These __________(63) tell a person when to wake, when to _________(64) and when to seek food. Scientists say there probably are other biological clock cells that __________(65) other body activities.
51 A says B asks C talks D tells
52 A reach B leave C escape D enter
53 A affect B adopt C avoid D express
54 A time B value C amount D number
55 A days B months C minutes D weeks
56 A shape B type C form D color
57 A physical B biological C mental D portable
58 A operation B flight C movement D transportation
59 A derived B prevented C originated D protected
60 A but B unless C therefore D if
61 A parts B ideas C sorts D images
62 A tries B likes C seems D wants
63 A functions B places C actions D cells
64 A lie B sleep C stand D walk
65 A build B demand C reflect D control
參考答案：51D 52 B 53A 54D 55A 56D 57B 58B 59B 60A 61A 62C 63D 64B 65D
篇二:
Happily married people have lower blood pressure 51 unhappily married people or singles, a Brigham Young University study says.
On the other hand, even having a supportive social network did not translate into a blood pressure benefit for singles or unhappily __ 52 ___ people, according to the study.
"There seem to be some unique health benefits from marriage. It’s not just being married __ 53 __ benefits health - what’s really the most protective of health ’is having a happy 54 ," 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 is not really __ 58 __ of the fluctuations 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 of Behavioral Medicine.
The study also found that unhappily married adults have higher blood pressure than __ 64 happily married and 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.
練習：
51. A from B to C than D by
52. A married B engaged C linked D loved
53. A which B that C this D what
54. A life B marriage C partner D spouse
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 representative D protective
59. A most B lower C higher D least
60. A pressure B speed C level D flow
61. A stopped B dropped C rose D ran
62. A more B some C much D any
63. A page B number C copy D issue
64. A nor B both C neither D either
65. A another B each C other D every
答案：CABBC ABCBA BCDBA
