[单项选择]Because of their (rapidly) changing (economically) fortunes, many frontier towns of the American West (underwent) spectacular fluctuations in (population) in the nineteenth century.
A. rapidly
B. economically
C. underwent
D. population

[填空题]Economically, Asia is still the most dynamic region in the world. Asia will surely______________(只要充分发挥自己的优势，一定能够为促进世界和平与发展做出更大的贡献)

[单项选择]

Economically, the world can be divided into two parts. The difference between them is that one part is poor and the other is wealthy. In the poor countries of the world, a lot of people never get enough to eat. In the wealthy countries, a lot of people eat too much. The tragedy is that there are more people in the poor countries than there are in the wealthy countries. It is estimated that about 80% of the world’s population cannot afford to have proper food, housing or medical care. The poorer countries are often referred to as the Third World. They have special problems. Often their land is too poor to grow anything on. The land can be improved. But a lot of things have to be done first, new farming methods have to be introduced, people have to be educated, and reliable sources of water and energy have to be found.
Many of these problems are too complex for one country to solve alone. Outside help is needed, but it has to be the right kind of help. Money is not en
A. There are more wealthy countries in the world.
B. There are more poor countries in the world.
C. There are more wealthy people in the wealthy countries.
D. There are more poor people in the poor countries.

[单项选择]

California families are facing a rapidly mounting uphill battle to make enough money to provide basic household essentials, according to a new study conducted by the California Budget Project.
The research compiled by the Sacramento-based non-profit organization concluded an average two-parent family with one employed adult in California needs to make $51,177 a year, or $24.60 cents an hour, to pay for housing, transportation, food, utilities, child care, health coverage, taxes and other basic expenses.
The number grows significantly higher in the Bay Area, the state’s most expensive region. A Bay Area family of four with two working adults living in rental housing needs a combined income of $79,946 to cover essential needs. That number is more than four times greater than the $19,157 income level recognized by the federal government as impoverished.
The study is the fourth semi-annual survey conducted by the California Budget Project since 1999.
A. twice
B. five times
C. four times
D. three times

[简答题]Computer science is developing rapidly these years.

[单项选择]The rapidly expanding number of automobiles threatens a further escalation in the emission of carbon dioxide.（）
A. 由于汽车工业的迅速扩展，二氧化碳的排放量也进一步增加。
B. 汽车数量迅速增长，这意味着二氧化碳排放量会进一步增加。
C. 汽车数量的迅速增长可能会造成二氧化碳排放量的进一步增加。
D. 汽车工业的迅速扩展威胁到二氧化碳排放量的进一步控制。