We realize this isn’t a rigorous scientific study,but we believe it is a reasonable real-world test of good manners around the globe. And it's comforting to know that in a place where millions of people push one another each day tO get ahead，they’re able to do it with a smile.Hey,if they Can make nice here，they can make nice anywhere.
41.Which of the following is the best wold to describe the experiments?
A.Scientific. B.Biased. C.Revolutionary. D.Realistic.
答案：D
42.The examples of the pregnant woman and Liz are used to show that some people___________________.
A.may take the trouble to help others
B. Won’t take the trouble to help others
C.mayhelp others save time
D.won’t help others save time
答案：A
43.According to the experiments，________________.
A.women are more careful.
B.women are more likely tO need help
C.men are more ready to.help
D. men are more democratic in helping others
答案：C
44.Helping others is a behavior that is largely influenced by_______________.
A.social norm
B.family education
C. pecifie situation
D.personal character
答案：B
45.The results of the experiments have shown that common courtesies_______________.
A.are still with us
B.are disappearing
C. vary with professions
D. need rigorous study
答案：A
Passage Four
Within a large concrete room，Cut out of a mountain on a freezing-cold island just 1,000 kilometres from the North Pole，could lie the future of humanity.
The room is a vault(地下库)designed to hold around 2 million seeds,representing all known varieties of the world’S crops.It is being built to safeguard the world’S food supply against nuclear War,climate change，terrorism，rising sea levels，earthquakes and the collapse of electricity supplies。“If the worst came to the worst，this would allow the world to reconstruct agriculture on this planet，”says Cary Fowler,director of the Global Crop Diversity Trust，an independent international organisation promoting the project.
The Norwegian(挪威的)government is planning tO create the seed bank next year at the request of crop scientists.The ＄3 million vault will be built deep inside a sandstone mountain on the Norwegian Arctic island of Spitsbergen.The vault will have metre-thick walls of reinforced concrete and will be protected behind two airlocks and high-security doors.
The vault’S seed collection will represent the products of some 10，000 years of plant breeding by the world’S farmers.Though most are no longer widely planted，.the varieties contain vital genetic properties still regularly used in plant breeding.
To survive，the seeds need freezing temperatures.Operators plan to replace the air inside the vault each winter,when temperatures in Spitsbergen are around-18℃.But even if some disaster meant that the vault Was abandoned,the permanently frozen soil would keep the seeds alive.And even accelerated global warming would take many decades to penetrate the mountain vault.
