There may be announcement about this tomorrow-or not , as case may be. A．an; the B．the; a C．the ;the D．the; / 题目和参考答案——青夏教育精英家教网—

A black hole is a place in space where gravity pulls so much that even light cannot get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying.

Because no light can get out, people can’t see black holes. Space telescopes with special tools can help find black holes. The special tools can see how stars that are very close to black holes act differently from other ones.

Black holes can be big or small. Scientists think the smallest black holes are as small as just one atom. These black holes are very tiny but have the mass of a large mountain. Mass is the amount of matter, or “staff”, in an object.

Another kind of black hole is called “stellar”(星球黑洞). Its mass can be up to 20 times more than the mass of the sun. There may be many stellar mass black holes in Earth’s galaxy. Earth’s galaxy is called the Milky Way.

The largest black holes are called “supermassive”(超大质量黑洞). These black holes have masses that are more than one million suns together. Scientists have found proof that every large galaxy contains a supermassive black hole at its center. The supermassive black hole at the center of the Milky Way galaxy has a mass equal to about four million suns and would fit inside a very large ball that could hold a few million Earths.

Scientists think the smallest black holes formed when the universe began. Stellar black holes are made when the center of a very big star falls in upon itself, or falls apart. When this happens, it exploded part of the star into space. Scientists think supermassive black holes were made at the same time as the galaxy they are in.

A black hole can not be seen because strong gravity pulls all of the light into the middle of the black hole. But scientists can see how the strong gravity affects the stars and gas around the black hole. Scientists can study stars to find out if they are flying around, or orbiting a black hole.

When a black hole and a star are close together, high-energy light is made. This kind of light cannot be seen with human eyes. Scientists use satellites and telescopes in space to see the high-energy light.

1.The gravity of a black hole may become so strong that light cannot get out when ____________.

A. the star is going to die

B. special tools are used on it

C. other stars come close to it

D. it is seen from the space telescopes

2.According to the passage, which of the following is NOT true?

A. A black hole can be very tiny but extremely heavy.

B. The gravity of a black hole holds all light in its center.

C. Scientists observe high-energy light through their own eyes.

D. Some small black holes came into being as early as the universe.

3.The underlined word “galaxy” in Paragraph 5 means __________.

A. a black hole B. the Milky Way

C. a series of stars D. a planet near the earth

4.What does the last sentence in Paragraph 5 suggest?

A. Neither the sun nor the earth is as heavy as a black hole.

B. There is a supermassive black hole at the center of the Milky Way.

C. The supermassive black hole had existed before the Milky Way was formed.

D. There is a reason why the large black holes are called “supermassive”.

5.The last two paragraph mainly focus on the question of _________.

A. what a black hole is

B. how black holes form

C. how big black holes are

D. how scientists know about black holes

After a long day at school, I walked home with my heavy schoolbag. Sleepy and 1 , I threw my things on the sofa and picked something from the 2 to eat. I passed by the living room and wished I could watch TV, but I knew my 3 would take me the whole night. I took my schoolbag and went 4 to my room. I tried to understand chemistry and 5 sleepiness at the same time. I tried to keep my eyes 6 and I wanted something to cheer me up.

Later, I 7 the sound of the front door opening. And I waited for it—the sound of my mom singing. Though she sang off-key(跑调), 8 made me excited that she was here. I ran down to 9 my mom. We hugged each other and talked for a while. I like it when my mom was happy. Her 10 seemed to flow down to me and I got the strength to 11 the stress (压力) again.

Sometimes, I wonder how my mom can still be 12 after coming back from work. Every weekday, she wakes up 13 in the morning to go to work and spends all hour on the bus before getting downtown. At a 14 factory, she works standing for the whole day and draws patterns(图案) for clothes over and over. After work, my mom at times gets stuck(被困) in 15 for two hours on her way back home. When I 16 my school life with her work life, I should not be the one to 17 . At least I have some interesting things to do at school, but one mistake at work can cost my mom her job. I 18 that my mom has a positive (积极的) attitude and lives her life with a joyous heart, which encourages me to do my work well, 19 there may be difficulties. Seeing her happy makes me feel 20 , too.

1. A．heavy B．busy C．hungry D．unlucky

2. A．classroom B．kitchen C．bedroom D．apartment

3. A．dream B．supper C．homework D．experience

4. A．downstairs B．outside C．upstairs D．inside

5. A．break B．put C．get D．fight

6. A．opening B．opened C．open D．closing

7. A．felt B．listened C．raised D．heard

8. A．which B．that C．it D．but

9. A．look B．greet C．said to D．help

10. A．need B．idea C．faith D．energy

11. A．face B．change C．accept D．1eave

12. A．creative B．sensitive C．competitive D．positive

13. A．early B．soon C．fast D．1ate

14. A．furniture B．shoe C．car D．clothing

15. A．chat B．traffic C．duty D．task

16. A．replace B．exchange C．decorate D．compare

17. A．complain B．decide C．study D．play

18. A．achieve B．notice C．admire D．improve

19. A．however B．though C．despite D．at least

20. A．good B．skillful C．successful D．important

Imagine that you are sitting in a park and suddenly remember that you need to send an urgent email. You have your laptop computer with you and you connect it to a wireless access point and access the Internet. Then you send your email. This wouldn’t have been possible if there were no wireless Internet for laptops. Wireless Internet has come into our life in so many ways that we don’t even realize what a necessary part it has become of our day-to-day lives.

How do we connect to a wireless Internet service for laptop computers? There are two ways to do this. They are Wi-Fi connection and Bluetooth connection. Wireless networking is very easy. You just switch on the Wi-Fi button that has been provided in the laptop for Wi-Fi scanning. Once that is done, the computer will connect to the Internet.

An interesting fact about Wi-Fi networking is that you can create a network between similar wireless equipment. Consider a situation where you and your friend both have Wi-Fi laptops, and there is some data you want to exchange. Traditional networking architecture demands that you have a wireless router (路由器). But the beauty of Wi-Fi networking technology is that you can set up a network between you and your friend’s laptop, and share all the data you want.

Broadband (宽带) Internet connection is typically preferred by any user as it provides better speed for Internet surfing. Up until the invention of 3G mobile phones, Internet speed on mobile phones was very slow. 3G has the promise of changing the entire face of broadband technology. Just imagine browsing at speeds of more that 2MB per second. To give you a measure of the speed, 3G enables you to watch high quality live videos on the Internet.

It is amazing to see how technology changes and the rate at which it changes. There may come a time when you may be able to browse using mobile wireless Internet for laptops anywhere in the world.

1.What can we learn from Paragraph 1?

A．Wireless Internet will become a reality soon.

B．We can send emails outdoors through wireless Internet.

C．Laptops enable us to do business everywhere.

D．People can easily find a laptop to surf the Internet.

2.People can enjoy a wireless Internet service for laptop computers by .

A．connecting to another computer B．switching off the Wi-Fi button

C．using bluetooth connection D．connecting bluetooth to Wi-Fi

3.What should we do to share some data with a friend through Wi-Fi networking?

A．Use the same computer. B．Surf online.

C．Have a wireless router. D．Set up a network.

4.One main advantage of 3G mobile phones mentioned in the passage is .

A．their low price B．their different functions

C．their high Internet speed D．their bright future

Poverty today is a major global issue. Although there are all kinds of definitions used to explain it, in simple words, it means the inability of a person to even get his basic needs of food, shelter, clothing, safe drinking water, health and education. Poverty can be found in each and every corner of the world, although the causes may differ from country to country. Given below are the main causes of poverty in the world today.

Overpopulation is one of the main causes behind the threatening of poverty on an individual level as well as a social level. This is simple math. If there are more mouths to feed and less income, definitely much will remain poor.

Another theory which is used as an explanation for poverty is lack of education. If you look at any of the underdeveloped countries, you will find that the level of education there is very low. Lack of education means lack of employment opportunities, thus leading to unemployment coupled with poverty in the future.

Moving away from one’s own homeland to another city or country in search of employment leads to poverty too. It may take these people a lot of time to find jobs. Meanwhile they live in bad conditions. The cost of living in the city or country is most of the time too high for them.

There may be other causes of poverty like the change in business. For example, in America, a couple of decades ago, heavy industry flourished, which employed a lot of African-American people. But now, the focus is more on information technology and health care, both of which employ only skilled and trained people. This has led to unemployment among African-Americans.

Poverty has many ill effects on society. That’s why steps should be taken to get rid of it!

1.What’s the meaning of the underlined word “flourished” in Paragraph 5?

(No more than 5 words)

2.Why is overpopulation a cause of poverty today? (No more than12 words)

3.What’s the situation of education in underdeveloped countries? (No more than 8 words)

4.What does the passage mainly talk about? (No more than 10 words)

5.In your opinion, what’s the most significant cause of poverty today? Please give your reason. (No more than 25 words)

Many of the world’s pollution problems have been caused by the crowding of large groups of people into the cities. Supply for the needs of the people leads to further pollution by industry. If the rapid increase of world population in countries continues at the present rate, there may be much greater harm to human beings. Some scientists speak of the increase in numbers of people as “population pollution.”

About 2,000 years ago, the world population was probably about 250 million. It reached a billion in 1850. By 1930 the population was two billion. It is now three and a half billion. It is expected to double by the year 2,000. If the population continues to grow at the same rate, there will be 25 billion in the world a hundred years from now.

Man has been using the earth’s resources more and more rapidly over the past years. Some of them are almost used up. Now many people believe that man’s greatest problem is how to control the growth of the population. The material supplies in the world will be far from enough to support the human population, in time to come, if the present rate of increase continues. Already there is overcrowding in many cities and starvation in some countries. Should man’s population keep on growing so rapidly as before? Many people believe that human survival in the future depends on the answer to this question.

59. The rapid increase in population is considered to be __________.

A. the increase of resources B. population pollution

C. the development of mankind D. the present rate

60. The world population will be _________ by the year 2,000.

A. 7 billion B. 250 million C. 25 billion D. 3.5 billion

61. If the present rate of increase continue, ________________.

A. the world is going to end

B. the earth won’t be able to support the growing population in the future

C. pollution has nothing to do with the rapidly increasing population

D. there would be four billion in the world a hundred years from now

62. Which of the following is WRONG according to the passage?

A. In 1850 the world population reached a billion.

B. Man must fight a battle against population pollution.

C. The world’s population is increasing with years.

D. All of the earth’s resources are gone now.

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