1 . Urbanization

Until relatively recently, the vast majority of human beings lived and died without ever seeing a city. The first city was probably founded no more than 5,500 years ago.    1    In fact, nearly everyone lived on farms or in tiny rural（乡村的）villages. It was not until the 20th century that Great Britain became the first urban society in history—a society in which the majority of people live in cities and do not farm for a living.

Britain was only the beginning.    2    The process of urbanization—the migration（迁徙）of people from the countryside to the city—was the result of modernization, which has rapidly transformed how people live and where they live.

In 1900, fewer than 40% of Americans lived in urban areas. Today, over 82% of Americans live in cities. Only about 2% live on farms.    3    

Large cities were impossible until agriculture became industrialized. Even in advanced agricultural societies, it took about ninety-five people on farms to feed five people in cities.    4    Until modern times, those living in cities were mainly the ruling elite（精英）and the servants, laborers and professionals who served them. Cities survived by taxing farmers and were limited in size by the amount of surplus food that the rural population produced and by the ability to move this surplus from farm to city.

Over the past two centuries, the Industrial Revolution has broken this balance between the city and the country.    5    Today, instead of needing ninety-five farmers to feed five city people, one American farmer is able to feed more than a hundred non-farmers.

A．That kept cities very small.

B．The rest live in small towns.

C．The effects of urban living on people should be considered.

D．Soon many other industrial nations became urban societies.

E．But even 200 years ago, only a few people could live in cities.

F．Modernization drew people to the cities and made farmers more productive.

G．Modem cities have destroyed social relations and the health of human beings.

2 . Mars on Earth

Devon Island has always been a cold and uninhabited(无人居住的) place in the Canadian Arctic. Day after day there are high winds and the temperature is below freezing. But for the first time, despite the terrible weather conditions, Devon Island is the new home for a group of explorers from NASA. They are living here for a few months in order to train and learn how to live and work on Mars. The group’s members come from various backgrounds and nationalities, but they all have the same purpose: to find out how people can live on Mars in the future.

They have chosen Devon Island because the environment and landscape is similar in many ways to Mars. The surface is freezing cold and the ground is rough. However, there are some differences on Mars, where the atmosphere is poisonous to breathe. Devon Island is easier to travel to and it has its own dangers that you won’t find on Mars. For example, you might meet a hungry polar bear on Devon Island!

One thing the team wants to develop is suitable clothing for Mars. This includes a space suit. The suit they are testing at the moment is strong enough but it’s too difficult to put on and take off. It’s very big and bulky, which means that just walking around is very difficult and tiring. In addition, people will need to do experiments on Mars while wearing the suit so they have to be able to move around easily. One team member, Andy Overbeeke, specializes in space suit engineering. He explains, “You have to think about what they’re really going to operate in.”

Another part of daily life on Mars will be meals and food. Creating a new home on Mars requires a lot of food. So the big question is: can you grow plants in order to survive? Scientists believe that growing plants on Mars might be possible. Mars and Earth have many similarities. They both have about the same amount of dry land and a 24-hour day. However, the atmosphere on Mars is totally different, so Canadian scientist Alain Berinstain is attempting to grow plants in a special greenhouse that you could also build on Mars. The greenhouse needs to run 365 days a year, so it uses a combination of solar energy and wind power.

People living on Mars will also want their own transportation. For this, the team on Devon Island have built the “Martian Rover”. It’s a huge heavy vehicle that can travel over rocks and rough terrain. This kind of testing takes many days but so far the work has been valuable and effective. As a result, the whole team now believes their work is crucial and that it’s possible for humans to land on the planet Mars and create a home there. Addy Overbeeke adds: “We know that it’s man’s destiny to go out and do space exploration. It’s always time to think about what you want to do in the future.”

1. The explorers are living on Devon Island to ________.

A．receive a training in astronomy

B．set up an advanced research lab

C．learn how to live and work on Mars

D．make a living in an uninhabited land

2. To keep food supply on Mars, people should ________.

A．create a new home

B．improve the atmosphere

C．build special greenhouses

D．reduce the area of dry land

3. According to the passage, we know that ________.

A．man may live on Mars in the future

B．Martian Rover has failed to stand the test

C．Mars and Devon Island have the same soil condition

D．scientists have mastered the method to grow plants on Mars

3 . History of Alaska State

The existence of mankind in Alaska can be traced back to 16, 000 B.C. to 10, 000 B.C., when the Paleolithic(旧石器时代) families crossed the Bering Land Bridge and formed settlements in the western part of Alaska. At this point of time, Alaska was inhabited by the Inuit tribes(部落) and American Indians.     1    

In the 18th century. the Russians began to regularly travel down to the Aleutian Islands, near the coastline of Alaska.     2     These expeditions began setting up permanent settlements and trading posts by the end of 1790s.

In some places, the Russian fur traders were able to establish very peaceful relations with the native tribes. However, in some places, the settlers and the tribes engaged in constant conflicts.     3     The Aleut population, however, was significantly wiped out, due to diseases that were brought by the Russians, against which they had no immunity.

    4     It was because the trade profits of the Russian settlements were very low and it was difficult to prevent British and Americans from coming to Alaska. The financial difficulties of Russia promoted the authorities to sell Alaska to the United States of America for $7, 200,000.

On October, 1867, the flag of the United States of America was raised for the first time in the history of Alaska. During the World War Il, three Aleutian Islands were occupied by the Japanese forces. Some of the villagers were taken to Japan as captives. The islands were regained by the United States forces in 1943.

Today, as a part of the United States of America, Alaska is considered to be one of the most beautiful states in the country.     5     Its beauty attracts visitors not only from within the United States but also from all over the world.

A．It is a favorite tourist destination.

B．The Russians never fully colonized Alaska.

C．Several expeditions were sent to claim the coasts.

D．The travelers were basically fur traders and hunters.

E．Even today, some of these tribes exist.

F．Britain started expanding its trade into the interiors of Alaska.

G．Fights were often seen between the Russians and the Aleut tribes.