1 . The Hadza hunter-gatherers of Tanzania live a life that has not changed much over ten thousand years. They have no crops, no house animals, no permanent shelters. In spite of long exposure to agriculturalist groups around them, the Hadza have maintained their lifestyle.

The story of the spread of agriculture is the story of growing population density (密度). Villages formed, then cities, then nations. Agriculture’s rise, however, came with a price. It introduced infectious diseases, social inequality, occasional famines (饥荒) and war. Professor Jared Diamond of UCLA (University of California, Los Angeles) has called the adoption of agriculture “the worst mistake in human history”— a mistake from which we have never recovered.

Looking at the Hadza, you can see why he came to this conclusion. They do not engage in warfare. They do not live densely (稠密地) enough to be threatened by an infectious outbreak. They have no known history of famine (饥荒). The Hadza diet is more stable (稳定 的) and varied than that of most of the world’s citizens. They live almost entirely free of possessions. They enjoy an extraordinary amount of leisure time, “working” — actively pursuing food — only four to six hours a day.

The chief reason the Hadza have been able to maintain their lifestyle so long is that their homeland is not an inviting place. Recently, however, population growth has brought a flood of people into Hadza lands. The region has generally been viewed by outsiders as unused, a Place in need of development. The Hadza, who by nature are not a combative (好战的) people, have almost always moved away instead of fighting.

There are many things to envy about the Hadza, mostly what free spirits they appear to be. Free from schedules, jobs, bosses, bills, traffic, taxes, laws, social duties and money. But who of us could live like them? It’s incredibly risky. Medical help is far away. One bad fall from a tree, one bite from a snake, and you’re dead. The fact is that it’s too late for us to go back to the Hadza lifestyle. Of greater concern is that soon it may be impossible for them to maintain theirs.

1. What does the underlined word “It” in paragraph 2 refer to?

A．Agriculture’s rise.	B．The growth of population.
C．The formation of village.	D．The appearance of a city.

2. What’s the characteristic of the Hadza?

A．They are always busy in all seasons

B．They like fighting with the other nations

C．They are often in hunger because of fight

D．They are always leading a free life without fight.

3. What can be learned from the last paragraph?

A．It’s convenient for the people of Hadza to get medical care.

B．It’s worth visiting the beautiful scenery of the Hadza.

C．Visitors can be welcomed warmly by the people of the Hadza.

D．The author is worried about the current situation of the Hadza.

4. Which is the best title for the text?

A．Agriculture of the Hadza	B．The Unique Hadza Lifestyle
C．The Attractive Diet of the Hadza	D．The Medical Care of the Hadza

2 . For almost all of human history, the Earth's population has tended to be younger. But since the last World Population Day on July 11, a major shift occurred: There are now more people aged 65 and older than there are under age five.

World Population Day was established by the United Nations Development Program in 1989 to bring attention to population issues. Having more people on the planet is not the only concern, though, since a population's age structure matters too.

Increased lifetime is a remarkable human success story, but having more elderly people also creates a number of socioeconomic concerns. The global population will continue to age as these two groups grow in opposite directions. By 2100, the percentage of the population aged 65 and older will rise to nearly 25 percent — about five times that of children under five.

“Most developed countries have been aging for a century, giving them time to prepare for the changes. But developing countries will become old before they become rich,” says researcher Toshiko Kaneda. Many countries in Latin America and Asia are aging much faster and have less time and resources to prepare health-care systems.

What are the consequences of an older global population? Supporting elderly people is more expensive than caring for young ones. Pressing issues arise like how to provide long-term care, and maintain a labor force. In developed regions like Europe, where 10 percent of the population over age 50 is childless, elderly care is a major worry.

“Not a single country has been able to change declining trends in fertility (生育) despite government requests for people to reproduce as has been done across Europe and in Japan,” Kaneda says. “The aging trend is continuous. ”

But declining fertility rates can have positive effects too, says Kaneda. When fertility rates decline but the population hasn't aged yet, governments can spend more on secondary and higher education, and benefit the economy. Both Thailand and South Korea have seized the opportunity during this ideal period.

1. What do we know about the global population?

A．It tended to be younger until now.

B．People are living longer and having fewer kids.

C．Age structure matters more than population size.

D．Developed countries are facing tougher challenges.

2. Which chart shows the global trend in the percentage of children under five?

A．	B．
C．	D．

3. What's Kaneda's attitude towards the global population issue?

A．Critical.

B．Objective.

C．Optimistic.

D．Doubtful.

4. What is the text mainly about?

A．The declining trend in the fertility rates.

B．The consequences of the aging population.

C．The establishment of World Population Day.

D．The present situation of the global population.

3 . An immigrant is a person who has come to live permanently in a country that is not their own. More than 145 million immigrants live outside their native countries.

    1    Some people move because of war, political or economic problems, or natural disasters such as earthquakes and floods. Some immigrants move to be with family members, to marry, or to find better living conditions.

Where are immigrants moving from?     2     One of the largest immigration flows is from Latin America and Asia to the United States. Another immigrant flow is from Eastern Europe, the former Soviet republics and North Africa to west Europe.    3     In countries such as Saudi Arabia, 90% of the total population is now foreign born.

When immigrants arrive in a new country, they often live in urban neighborhoods. As a result of immigration, many city neighborhoods change.    4    For example, the historic Esquilino neighborhood in Rome is now the home of a large number of Chinese immigrants. There are also many new immigrants from Albanian, Moldova, Bulgaria, and Ukraine. In some schools in Athens, 50% of the children are foreign born.    5    In Los Angeles, 37% of the population is foreign born, and children in the public schools speak 82 different languages. In New York, 40% of the population is foreign, and children speak 140 different languages in the schools.

A．And what countries are they moving to?

B．Immigrants move to other countries for different reasons.

C．Immigrants have contributed to British culture in many ways.

D．Immigrants open new stores, restaurants, and other businesses.

E．Many immigrants also move from Africa and Asia to the Middle East.

F．Moreover, Los Angeles has a track record of successfully accepting immigrants.

G．Los Angeles and New York are two cities in the US with very large immigrant populations.