51. A. realize
B. suggest
C. hope
D. prove
52. A. agreement
B. expression
C. acceptance D. education
53. A. necessarily
B. completely
C. naturally
D. frequently
54. A. learn
B value
C. hate
D. try
55. A. Power
B. Beauty
C. Trust
D. Life
第三部分 阅读理解(共15小题;每题2分,共30分)
A
Science can't explain the power of pets, but many studies have shown that the company of pets can help lower blood pressure (血压) and raise chances of recovering from a heart attack, reduce loneliness and spread all-round good cheer.
Any owner will tell you how much joy a pet brings. For some, an animal provides more comfort than a husband or wife. A 2002 study by Karen Allen of the State University of New York measured stress (紧张) levels and blood pressure in people— half of them pet owners —while they performed 5 minutes of mental arithmetic (算术) or held a hand in ice water. Subjects completed the tasks alone, with a husband or wife, a close friend or with a pet. People with pets did it best. Those tested with their animal friends had smaller change in blood pressure and returned most quickly to baseline heart rates. With pets in the room, people also made fewer math mistakes than when doing in front of other companions. It seems people feel more relaxed (放松) around pets, says Allen, who thinks it may be because pets don't judge.
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