[单项选择]（）, the world may have population of 12 billion in a century.
A. If man can live longer in the future
B. If the science of medicine is developing fast enough
C. If the population growth is not reduced
D. If the earth is able to provide a good life for more people

[单项选择]When did the world's population reach six billion


A. October 10, 1999.
B. October 11, 1999.
C. November 10, 1999.
D. November 11, 1999.

[单项选择]When will the world's population hit 10 billion


A. 2010.
B. 2002.
C. 2036.
D. 2054.

[单项选择]As to the world population, the public have the same idea as the experts.

[单项选择]It is postulated that population trends have an effect on economic fluctuations.
A. challenged
B. assumed
C. accepted
D. doubted

[单项选择]How many people around the world have diabetes


A. 135,000,000.
B. 13,500,000.
C. 1,350,000,000.
D. 1,350,000

[单项选择]The population of the world has grown very fast ______ four hundred years.（）
A. for pass
B. in the pass
C. in the past
D. for past

[单项选择]Researchers all over the world have been seeking for determining how early infancy conceptual thinking is possible.


A. have been seeking about determining
B. have been seeking to determine about
C. have been seeking to determine
D. have sought to determine

[单项选择]Many human languages of the world have certain common characteristics EXCEPT that


A. humans have a natural, innate ability to acquire and create language.
B. focusing on how to use a language is the fastest way to communicate.
C. language learners learn primarily from their peers, who are also learners.
D. because human languages are changing constantly, so they are flui

[单项选择]China has a population of 1.3 billion, （　） it the largest country in the world by population.
A. making
B. made
C. makes
D. to make

[单项选择]

People in different parts of the world have very different ideas about what is good to eat. Even when people in different countries eat the same food, they often prepare it very differently. If you were in Germany, you would find soup that is thick and heavy. If you were in China, you would find soup that is thin and clear. On holidays most of us eat special foods. Year after year, even if many other things change, the food is always the same. Sometimes housewives begin weeks in advance to prepare the special foods that are traditionally served on certain holidays.
People in different parts of the world also have different ideas about what is good to drink. Among the most popular hot drinks are coffee and tea. Coffee is very popular in northern Europe and in the Middle East. Some people put cream and sugar in their coffee. But in the United States, many people drink their coffee "black" that is without cream or sugar. Tea is the national drink in China,
A. change a lot year after year
B. have different tastes with the years passing by
C. remain the same for many many years
D. be served before certain holidays