[填空题]Japanese-Americans who live in strongly Japanese neighborhoods and have mainly Japanese friends tend to live longer than those who do not.

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Japanese people, who never miss a chance to be photographed, were lining up to get their picture on a postage stamp. Vanity stamps that feature personal photographs went on sale for the first time in Japan as part of an international postage stamp exhibition. The customer’s photo is taken with a digital camera and then printed on stamp sheets, a process that takes about five minutes. Sold in a sheet of 10 stamps for $ 8.80, little more than the cost of lunch in Tokyo, each stamp features a different scene from a traditional ukiyo-e along with the photo. The stamps can be used normally to mail a letter, and postal officials hope they will help promote interest in letter-writing in the Internet age. "Certainly e-mail is a useful method of communication, but letters are fun in a different way," said an official in the Posts Ministry. "We want to show young people that letters can be fun too. " While similar stamp sheets debuted in Australia in 1999 and are
A. $8.80
B. $0.88
C. $10
D. $5

[填空题]People who live in heavily industrialized areas do not get as much sunlight as they should. Dust (1) over a city at altitudes (海拔) of between 4,000 and 8,000 feet cuts out between 20 and 50 percent of the sunlight and up to 90 percent of the ultraviolet light (紫外线). But dust is not the only thing to (2) about. When fuels are burned, whether in a factory, or in a home, or in the engine of a car, CO₂ is given off. CO₂ in the atmosphere acts as a kind of (3) around the earth, keeping warms in and so slowly raising the (4) of the earth. This could really change the climate all over the world.
Everybody wants to have a car. (5) , while they are giving us so much pleasure, cars are also poisoning us. The amount of dangerous substances sent out by a car is quite (6) . Did you know, for example, that a hundred cars produce on (7) a third of a ton of CO₂ as well a

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Women who live in the world’s highest communities tend to give birth to under-weight babies, a new study suggests. These babies may grow into adults with a high risk of heart disease and strokes.
Research has hinted that newborns in mountain communities are lighter than average. Bur it wasn’t clear whether this is due to reduced oxygen levels at high altitude or because their mothers are under-nourished — many people who live at high altitudes are relatively poor compared with those living lower down.
To find out more, Dino Giussani and his team at Cambridge University studied the records of 400 births in Bolivia during 1997 and 1998. The babies were born in both rich and poor areas of two cities: La Paz and Santa Cruz. La Paz is the highest city in the world, at 3.65 kilometers above sea level, while Santa Cruz is much lower, at 0.44 kilometers.
Sure enough, Giussani found that the averag
A. Right
B. Wrong
C. Not mentioned