[单项选择]In the first years of the 21st century, no area of the American economy has excited more emotion than the property market. First came the excitement of soaring prices. Then spirits came crashing down with the subprime crisis, and now homeowners are agonizing over how far values could fall. An even bigger story , however, may be yet to come. America should be bracing itself for the end of the "generational housing bubble", according to a new study by Dowell Myers and SungHo Ryu of the University of Southern California. As the country"s 78 million baby-boomers retire, the report argues, the housing market will change dramatically. For three decades baby-boomers have helped push prices up: they settled down, and then bought bigger houses and second homes. But as the first of them celebrate their 65th birthdays in 2011, this may change. The old sell more homes than they buy. The ratio of old to working-age people is expected to grow by 67% over the next two decades. Will the younger generation be able to buy all the homes on the market Young adults make up the bulk of new demand, with most purchasing homes when they reach their early 30s. The flood of elderly people selling their homes, Mr. Myers suggests, may lead to a drawn-out buyers" market. Prices may fall further as younger people, perceiving a downturn, delay purchasing. This phenomenon will unfold differently across the country. Some states will begin the sell-off later than others. In 15 southern and western states—including the retirement magnets of Florida and Arizon-a—the elderly do not become net sellers until their 70s. Expensive states such as California and the cold states of the mid-west and northeast are likely to lose them more quickly. The mismatch between buyers and sellers may be most acute in the rustbelt, where numbers of young people and immigrants are rising slowly, if at all, says William Frey of the Brookings Institution, a think-tank. Of course, there may be other outcomes. Suburbs, which swelled with the baby-boomers, may begin to decline. If the building industry contracts, home prices may remain more stable. Or developers may switch to serving the old, building more compact housing near amenities. Towns may make new efforts to attract immigrants, who already accounted for 40% of the growth in homeownership between 2000 and 2006. Among these unknowns, one thing is more certain: the housing market is about to enter a long period of transition. The youngest baby-boomers will not turn 65 until 2029.William Frey believes that
A. people in southern states would not lose their homes until 70s.
B. people in expensive states would lose their money more quickly.
C. young people and immigrants hardly increase in the rustbelt areas.
D. elderly people would not like to retire in Florida and Arizona until 70s.

[单项选择]In the first years of the 21st century, no area of the American economy has excited more emotion than the property market. First came the excitement of soaring prices. Then spirits came crashing down with the subprime crisis, and now homeowners are agonizing over how far values could fall. An even bigger story , however, may be yet to come. America should be bracing itself for the end of the "generational housing bubble", according to a new study by Dowell Myers and SungHo Ryu of the University of Southern California. As the country"s 78 million baby-boomers retire, the report argues, the housing market will change dramatically. For three decades baby-boomers have helped push prices up: they settled down, and then bought bigger houses and second homes. But as the first of them celebrate their 65th birthdays in 2011, this may change. The old sell more homes than they buy. The ratio of old to working-age people is expected to grow by 67% over the next two decades. Will the younger generation be able to buy all the homes on the market Young adults make up the bulk of new demand, with most purchasing homes when they reach their early 30s. The flood of elderly people selling their homes, Mr. Myers suggests, may lead to a drawn-out buyers" market. Prices may fall further as younger people, perceiving a downturn, delay purchasing. This phenomenon will unfold differently across the country. Some states will begin the sell-off later than others. In 15 southern and western states—including the retirement magnets of Florida and Arizon-a—the elderly do not become net sellers until their 70s. Expensive states such as California and the cold states of the mid-west and northeast are likely to lose them more quickly. The mismatch between buyers and sellers may be most acute in the rustbelt, where numbers of young people and immigrants are rising slowly, if at all, says William Frey of the Brookings Institution, a think-tank. Of course, there may be other outcomes. Suburbs, which swelled with the baby-boomers, may begin to decline. If the building industry contracts, home prices may remain more stable. Or developers may switch to serving the old, building more compact housing near amenities. Towns may make new efforts to attract immigrants, who already accounted for 40% of the growth in homeownership between 2000 and 2006. Among these unknowns, one thing is more certain: the housing market is about to enter a long period of transition. The youngest baby-boomers will not turn 65 until 2029."An even bigger story" in Paragraph 1 implies that American property market will
A. continue to be the most exciting field in the American economy.
B. experience more dramatic changes in the following years.
C. make spirits go up with the decreased housing prices.
D. have greater impact on the feelings of homeowners.

[单项选择]By the first decade of the 21st century, international commercial air traffic is expected ______. vastly beyond today’s levels.
A. to have extended
B. being extended
C. to be extending
D. having been extended

[单项选择]During the first 70 years of the 20th century, inequality declined and Americans prospered together. Over the last 30 years, by contrast, the United States developed the most unequal distribution of income and wages of any high-income country.
Some analysts see the gulf between the rich and the rest as an incentive for strivers, or as just the way things are. Others see it as having a corrosive effect on people’s faith in the markets and democracy. Still others contend that economic polarization is a root cause of America’s political polarization. Could, and should, something be done
Claudia Goldin and Lawrence F. Katz, two Harvard economists, think yes. Their book, the Race Between Education and Technology (Harvard, $ 39.95), contain many tables, a few equations and a powerfully told story about how and why the United States became the world’s richest nation--namely, thanks to its schools.
The authors skillfully demonstrate that for more than a century, and at a steady
A. The wage movements in the U.S. are dominated by swings in the demand for education-related skills.
B. The American educational system is what made American the richest nation in the world.
C. Technology raced ahead of education in the first half of the 20th century.
D. American high school graduation rates leveled off at 80 percent in 1970.

[填空题] Jobs in the 21st Century What will our woad be like in 2050 Will families be smaller Will people change jobs and careers frequently Will there be more elderly people Around the world, people are living longer and staying (46) (healthy). People in (47) (economical) rich societies are having fewer children. For example, in the United States in 1980, people over age 65 made up only 11.3 percent of the total (48) In 2050 they will make up over 22 percent. In the 1950s the av (49) families had 4. 8 children. Now the average family has less t (50) one child. The aging population in the U.S. is going to af (51) the job market a great deal. Heahh and (52) (entertain)industries will need many more workers to provide services for older Americans. Jobs in education, es (53) adult education, will be increasing, too, as these older Americans are probably going to go back to school agai