Since the beginning of human evolution, men have migrated（迁移）across continents in search of food, shelter, safety, and comfortable weather. People still move for these reasons, but new reasons for human migration are arising, such as job relocation(重新安置) and overpopulation.
    Three million migrants are moving from poor countries to wealthier ones each year, and increasingly, their destination is a neighboring country in developing parts of the world. People are moving within the developing world for the same reasons as they migrate to wealthier nations. People from poor countries are going to less poor countries, fleeing wars and conflicts. They are also responding to population pressures because some countries are densely populated, and they often have high population growth. Those people need to go somewhere else.
    There are three main reasons why people move. The basic categories and percentages are as follows, according to the Current Population Surveys (CPS):
    Family-related reasons account for 26.3%, including changes in marital（婚姻的） status, establishing a household and other family reasons; work-related reasons 16.2%, including job transfer, retirement, and other job-related reasons; housing-related reasons 51.6%, including new and better houses, better neighborhood, cheaper housing and other housing reasons; the remaining 5.9% of other reasons are attending college, the change of climate and health reasons.
    Americans have been migrating south and west for decades in search of better job opportunities and warmer climates. They have also been moving to places a little far from cities, in search of bigger yards and houses, lower crime rates and better schools. In 1950, nearly a fifth of the population lived in the nation’s 20 largest cities. In 2006, it was about one in ten. That’s why many American people say, “Big Cities Shrink as People Move South, West.”
    Between March 2005 and March 2007, 73.4 million Americans moved. Fifty-six percent of these moves were within the same country. Twenty percent were between counties but in the same state. Nineteen percent were moves to a different state. Some families even went abroad.
Title: People on the   71 

阅读理解

　　A new study shows that a large and rapid drop in the world's birth rate has taken place during the past 10 years. Families generally are smaller now than they were a few years ago. It is happening in both developing and industrial nations.

　　China is one of the developing nations that has made great progress in reducing its population growth. China has already cut its rate of population growth by about one half since 1970.

　　Each Chinese family is now supposed to have no more than one child. And the hope is to reach a zero population growth with the total number of births equaling (相等于) the total number of deaths, by the year 2000.

　　Several nations in Europe already have fewer births than deaths. Researchers said that these nations could hardly have enough workers in the future. And the persons who are working could face much higher taxes to support the growing number of retired (退休的) people.

(1) Which of the following is true?

[　　]

A．Families are as large as before.

B．The world's birth rate is higher than ten years ago.

C．There was a slow population growth in the past ten years.

D．Birth control has been well practised in all nations.

(2) China has reduced its population growth by ________ since 1970.

[　　]

A．around fifty percent

B．far more than fifty percent

C．exactly one half

D．much less than one half

(3) According to the passage, China's population control ________.

[　　]

A．is not very successful

B．is a not-too-big success

C．is far from being successful

D．should be considered a big success

(4) By the year 2000, the number of births and the number of deaths in China will ________.

[　　]

(5) It is said that the people who are working in Europe would have to pay much higher taxes in the future because ________.

[　　]

A．they will be earning much more money

B．they will have more and more children

C．fewer and fewer children will be born

D．the number of retired people will become larger

The world’s population continues to grow. There are about five billion of us on earth now. It could reach six billion in 10 years’ time, and eleven billion in another 75 years. Experts have long been concerned about such growth. Where will we find the food, water, jobs, houses, schools and health care for all these people?

A major new study shows that situation may be changing. A large and rapid drop in the world’s birth rate has taken place during the past 10 years. Families generally are smaller now than they were a few years ago. This is happening in both developing and industrial nations. Scientists said they found a number of reasons for this. More men and women are waiting longer to get married. More women are going to school or working at jobs away from their home instead of having children. And more governments, especially in developing nations, now support family planning programs to reduce population growth.

China is one of the nations that have made great progress in reducing its population growth by about one half since 1970. China now urges each family to have no more than one child. And it hopes to reach zero population growth before long, that is, the number of birth equaling the number of death.

Several nations in Europe already have fewer births than deaths. Experts said that these nations could face a serious shortage of workers in the future.

1. In the sentence “Experts have long been concerned about such growth”, the phrase “concerned about” is similar in meaning to_____.

A. worried about      B. related to       C. busy working on     D. made a study of

2. “Family planning programs” means______.

A. economic policy in a country         B. economic policy in a family

C. TV programs for a family            D. birth control in a country

3. The world’s birth rate has dropped because_____.

A. people marry at a much later time

B. women would rather go to study or work than have children

C. some countries are carrying out the family planning programs

D. all the above

4. We hope that soon the number of birth and the number of death in China will_____.

A. be greatly different          B. be equal to each other

C. drop in great deal            D. become much larger

The world’s population continues to grow. There are about five billion of us on earth now. It could reach six billion in 10 years’ time, and eleven billion in another 75 years. Experts have long been concerned about such growth. Where will we find the food, water, jobs, houses, schools and health care for all these people?

A major new study shows that situation may be changing. A large and rapid drop in the world’s birth rate has taken place during the past 10 years. Families generally are smaller now than they were a few years ago. This is happening in both developing and industrial nations. Scientists said they found a number of reasons for this. More men and women are waiting longer to get married. More women are going to school or working at jobs away from their home instead of having children. And more governments, especially in developing nations, now support family planning programs to reduce population growth.

China is one of the nations that have made great progress in reducing its population growth by about one half since 1970. China now urges each family to have no more than one child. And it hopes to reach zero population growth before long, that is, the number of birth equaling the number of death.

Several nations in Europe already have fewer births than deaths. Experts said that these nations could face a serious shortage of workers in the future.

1. In the sentence “Experts have long been concerned about such growth”, the phrase “concerned about” is similar in meaning to_____.

A. worried about      B. related to       C. busy working on     D. made a study of

2. “Family planning programs” means______.

A. economic policy in a country         B. economic policy in a family

C. TV programs for a family            D. birth control in a country

3. The world’s birth rate has dropped because_____.

A. people marry at a much later time

B. women would rather go to study or work than have children

C. some countries are carrying out the family planning programs

D. all the above

4. We hope that soon the number of birth and the number of death in China will_____.

A. be greatly different          B. be equal to each other

C. drop in great deal            D. become much larger