Directions: Read the following text and choose the most suitable heading from A – F for each paragraph. There is one extra heading which you do not need.

76._________________

Astronomers estimate that there are about l,100 asteroids--or space rocks--with the potential to cause a planet-wide disaster in a collision with Earth．And since large asteroids have collided with Earth many times in the past，scientists say it is certain that Earth will be hit again．It is only a question of when． 

77. _________________

The asteroid that ended the age of the dinosaurs hit the Earth 65 million years ago．It was at least six miles(10 kilometers)wide．But smaller asteroids can also devastate （毁坏）the earth．Scientists estimate that a collision with an asteroid even one—tenth this size would kill at least 25 per cent of Earth’s population．Less than a hundred years ago，for example，an asteroid only 330 feet(100 meters)wide exploded in Siberia．It completely destroyed half a million acres of forest．

78．_________________

Asteroids come from a belt of tens of thousands of space rocks in orbit around the sun．They normally travel between Mars and Jupiter，but some smaller rocks are affected by the gravitational pull of Mars，Jupiter or Saturn and their orbits are stretched．Sometimes this change puts them on a path that crosses Earth’s orbit．This sets up the possibility of collision with Earth．

79．_________________

In l986，a potentially dangerous asteroid missed Earth by only six hours．Scientists only found out about the danger after it had passed．Many more asteroids have collided with Earth over the years．We can still see their marks today — large craters in the ground．

80．_________________

NOW there is a new--found seriousness about asteroid strikes．Astronomers are engaged in a painstaking search for all asteroids that threaten Earth．And the United States has a project called NEAR that involves orbiting and studying the asteroid Eros，the second largest asteroid near Earth．Studying the composition of the asteroid provides important information hat may allow an asteroid to be exploded or knocked of course to prevent it from colliding with Earth．

Many adults in the United States can remember crying the nursery rhyme in the street "Hot cross buns!" But only a few people realize this was an early form of advertising.

Written advertisements probably began with hieroglyphics more than three thousand years ago, but only a few people could read these symbols. So merchants made signs with pictures or hung their tools over their doors to identify their businesses.

In the time of the Roman Empire, wall paintings were a popular form of advertisement. An ad for a play, or some other performance was painted on part of a building or on a wall around a city. People often advertised a house for rent or a freshwater bath in this way, too.

Today, large wall signs are still used for outdoor advertising. But outdoor advertising is only a small fraction of the total advertising. About forty per -cent of all ads are printed in daily newspapers. Radio commercials also provide this kind of information. Some people think they are the best form of advertising because radio broadcasts reach almost everyone in a nation.

Advertisements in magazines and on television reach many people, too. However, usually only large companies can advertise on a national network, because TV commercials shown across the country can cost many thousands of dollars.

Then there are ads that are almost part of daily living. If you use public transportation, you will see large printed ads, called ear cards, on buses and taxis and in trains. Ads are painted on the trucks that deliver products people are buying or selling.

1.Which is the passage mainly discussing?

A．Modern advertising                     B．Significance of advertising

C．Development of advertising               D．Origin of advertising

2.Which of the following is the original form of advertising?

A．Signs with pictures                      B．Wall signs

C．Street crying                           D．Wall painting

3.Which of the following can best replace the underlined word “hieroglyphics” in Paragraph 2?

A．A signal           B．A signature        C．A symbol          D．A form

4.Why did the merchants make signs with pictures or hang their tools over their doors ?

A．To have their houses decorated.

B．To make their business known by public.

C．To enable people to learn how to read

D．To advertise their houses to rent

5.Radio commercials are the best form of advertising because ____________.

A．they can be heard everywhere in a country

B．they are cheap and fast

C．they are most recently developed

D．they can be understood by those who can neither read nor write

Many adults in the United States can remember crying the nursery rhyme in the street "Hot cross buns!" But only a few people realize this was an early form of advertising.
Written advertisements probably began with hieroglyphics more than three thousand years ago, but only a few people could read these symbols. So merchants made signs with pictures or hung their tools over their doors to identify their businesses.
In the time of the Roman Empire, wall paintings were a popular form of advertisement. An ad for a play, or some other performance was painted on part of a building or on a wall around a city. People often advertised a house for rent or a freshwater bath in this way, too.
Today, large wall signs are still used for outdoor advertising. But outdoor advertising is only a small fraction of the total advertising. About forty per -cent of all ads are printed in daily newspapers. Radio commercials also provide this kind of information. Some people think they are the best form of advertising because radio broadcasts reach almost everyone in a nation.
Advertisements in magazines and on television reach many people, too. However, usually only large companies can advertise on a national network, because TV commercials shown across the country can cost many thousands of dollars.
Then there are ads that are almost part of daily living. If you use public transportation, you will see large printed ads, called ear cards, on buses and taxis and in trains. Ads are painted on the trucks that deliver products people are buying or selling.
【小题1】Which is the passage mainly discussing?

第三部分阅读理解(共15小题；每小题2分，满分30分)

请认真阅读下列短文，从短文后各题所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。

Who owns the sea? The ships of all countries sail in the open seas. Not long ago, all countries could fish and hunt in the oceans as they pleased. But now, the countries using the sea must work together to protect the animal life in the seas.

In 1870, there were millions of valuable fur seals in the Berling Sea. Ships came from all over the world to kill them.

Man wanted the animals’ fur and their oil from their bodies. By 1930, only about 130,000 seals were left there in the seas and the oceans. Even the hunters themselves knew that something had to be done to protect them, otherwise the seals would die out or disappear from the earth forever.

Four countries owned the land near the seals’ northern home. In 1911, these countries began plans to control seal—hunting. The governments of these four countries, Japan, Russia, Canada and the United States, where the animals rested and gave birth to their young, formulated a policy that only male seals that didn’t have mates were to be divided among the four governments.

Today, large herds of seals swim in the Berling sea again. By working together, the four countries mentioned above have saved the seals in the seas they share.

1..The passage is mainly about ________.

A. the governments of the four countries       B. protecting seals

C. the seals’ northern home—the rocky island    D. the Berling Sea

2.Why did people hunt or kill seals in the open seas?

A. People wanted to eat the meat.     B. The seals were eating too many of the fishes.

C. Their fur and oil were very valuable   D. The seals were did much harm at that time

3.The four countries worked together __________.

A. in order to kill more seals       B. so as to protect the seal

C. to protect the seals’ rocky island—their northern home

D. in order to kill any seal that was alive in the open sea

4.According to the short passage, which of the following is true?

A. It is important to protect wildlife   

B. No more seals can be seen in the Berling Sea

C. Only one country could hunt or kill seals  

D. There are no seals in other parts of the world besides the Berling Sea

第三部分阅读理解(共15小题；每小题2分，满分30分)

请认真阅读下列短文，从短文后各题所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。

Who owns the sea? The ships of all countries sail in the open seas. Not long ago, all countries could fish and hunt in the oceans as they pleased. But now, the countries using the sea must work together to protect the animal life in the seas.

In 1870, there were millions of valuable fur seals in the Berling Sea. Ships came from all over the world to kill them.

Man wanted the animals’ fur and their oil from their bodies. By 1930, only about 130,000 seals were left there in the seas and the oceans. Even the hunters themselves knew that something had to be done to protect them, otherwise the seals would die out or disappear from the earth forever.

Four countries owned the land near the seals’ northern home. In 1911, these countries began plans to control seal—hunting. The governments of these four countries, Japan, Russia, Canada and the United States, where the animals rested and gave birth to their young, formulated a policy that only male seals that didn’t have mates were to be divided among the four governments.

Today, large herds of seals swim in the Berling sea again. By working together, the four countries mentioned above have saved the seals in the seas they share.

1..The passage is mainly about ________.

A. the governments of the four countries       B. protecting seals

C. the seals’ northern home—the rocky island    D. the Berling Sea

2.Why did people hunt or kill seals in the open seas?

A. People wanted to eat the meat.     B. The seals were eating too many of the fishes.

C. Their fur and oil were very valuable   D. The seals were did much harm at that time

3.The four countries worked together __________.

A. in order to kill more seals       B. so as to protect the seal

C. to protect the seals’ rocky island—their northern home

D. in order to kill any seal that was alive in the open sea

4.According to the short passage, which of the following is true?

A. It is important to protect wildlife   

B. No more seals can be seen in the Berling Sea

C. Only one country could hunt or kill seals  

D. There are no seals in other parts of the world besides the Berling Sea