1. Scientists have made many important new .......of the depth by using modern devices.(discover/ discoveries)

2. Community police have made a very positive.............to crime prevention.(contribute/ contributions)

3. They are investigating the............disappearance of a young woman. (Mystery/mysterious)

4. By the age of eighteen he was completely...........of his parents.(dependence/ dependent)

5. The...........of the seabed is being carried out (investigate/ investigation)

If you invented something important, (1)........ would want to make money out of (2) ........ , right? Most of us would want to make some money from (3) .......... invention . It seems only fair - we did the work, so the money should be (4) .......... too. Many inventors who have had (5) .......... inventions produced, have become rich and famous and we shouldn't blame (6) ........ for that. But have (7) ........ heard of Tim Berners-Lee? (8) ....... invented the World Wide Web on the Internet, one of the most important inventions of the last fifty years. Millions of lives have been changed by (9) .......... introduction. When Tim Berners-Lee invented the Web, he made a promise to (10) .......... - that he wouldn't make any money out of it, and that he would give (11) ......... invention to the world. He did, and now the Web belongs to all of (12) ......... . Ask (13) what life would be like if the World Wide Web wasn't free. We should be grateful to Tim Berners-Lee, and thank (14) ........ for (15) ...... amazing gift to the world.

It seems entirely (physical / natural /typical /real) to us that there are teams of scientists in universities and other institutions around the world, attempting to (create / invent / construct / discover) the way the world works.However, it hasn’t always been that (route /method / way / technique). Although the scientific method is now four or five hundred years old, the ancient Greeks, for example, believed that they could work out the (aims / reason / causes/ impulses) of natural events just by the power of thought. During the 17^th century, more and more people began to realize that they could (calculate / estimate / measure / test) their scientific ideas by designing relevant (experiment / research / attempt / analysis) and seeing what happened. A lot of (development / movement / progress / evolution) was made in this way by individual scientists. These men and women often worked alone. Carrying out (research / experiment / discovery/ education) into many different areas of science, and they often received very little (award / prize / gift / reward) for their hard work. At the start of the 20^th century, though, it became (clear / true / accurate / actual) that science was becoming more complicated and more expensive. The individual scientist disappeared, to be replaced by highly qualified teams of experts. Modern science was born.

Hoàn thành câu với dạng đúng của các động từ sau:
challenge cover depend investigate maintain
discover conserve mystery entrap contribute
1. The government has just set up a wildlife.....................project.
2. Community police have made a very positive...................to crime prevention.

3. Sperm whale populations are at risk due to hunting and their accidental..................in fishing nets.
4. Destruction of the environment is one of the most serious...................we face.
5. They are investigating the......................disappearance of a young woman.
6. Seventy-five percent of the earth surface is....................by water.
7. The power station has been shut dơn for essential.....................
8. The.....................of the seabed is being carried out.
9. Scientists have made many important new...............of the depth by using modern devices.
10. By the age of eighteen he was completely...................of his parents.

II. Complete the sentences with the words in the box.
challenged; discoveries; overcome; investigating; contribution;
covered; conservation; entrapment; maintained; migrate.
1. Scientists have made many important new.......... of the depth by using modern devices.
2. Community police have made a very positive ................to crime prevention.
3. This new discovery traditional beliefs. Some whales are known to.............into warm
waters to bear their calves.
5. Seventy-five percent of the earth surface is .............by water.
6. Unless the biodiversity were.............marine life would be at stake.
7. Scientists are.....................how the crash occurred.
8. Sperm whale populations are at risk due to hunting and their accidental in
..............fishing nets.
9. What can I do to.................my fear of flying?
10. The government has just set up a wildlife....................project.

There are some diseases for which we know no cure. For many of these, however, scientists have been able to discover a means of prevention. Smallpox is such a disease.

In the 18th century, millions of people died of smallpox, while many others who recovered from the disease were left scared for life. Today, it is rare to find a case at all.

By 1780, doctors had noticed that once person had smallpox, he became immune to it. From this observation, the theory of inoculation was developed. Inoculation is a way of deliberately giving a person a disease by placing disease matter under the skin. When this is done, the person may develop a mild case of the disease, but from then on he is safe from a severe attack.

Using this principle, an English doctor named Edward Jenner set to work against smallpox. He found that persons who had had a milder disease called cowpox could not catch smallpox. The cowpox seemed to make them immune. By taking some bacteria from the arm of a person who was ill with cowpox, and giving it to a healthy person, Jenner found that he could transfer the immunity. Jenner’s process came to be known as vaccination, from the Latin word “vacca”, meaning “cow”. Because of vaccination, smallpox, one of the man’s greatest enemies, has been practically wiped out.

1. While not directly stated, it may be inferred from the article that__________

A. There is no good cure for smallpox. B. smallpox has almost disappeared.

C. smallpox and cowpox are similar diseases. D. smallpox can disfigure people who suffer from it.

2. This article as a whole tells us__________

A. about an English doctor named Edward Jenner B. all about inoculation.

C. all about vaccination. D. how a terrible disease was conquered.

3. Vaccination means__________

A. Wiping out smallpox. B. Preventing diseases by prescribing medicine.

C. transferring immunity from one person to another. D. protecting cows from cowpox.

4. Inoculation against smallpox means__________

A. giving a person some medicine to take. B. placing diseased matter under his skin.

C. injecting him with some drugs. D. deliberately coming into contact with smallpox patients.

5. Which sentence is NOT true?

A. The principle of inoculation was well-known before 1700.

B. People who have been ill with cowpox are immune to smallpox.

C. Vaccination can prevent smallpox. D. In the 18th century, millions of people died of smallpox

Complete the sentences with the words in the box

1, Scientists have made many important new ..... of the depth by using modern devices

2, Community police have made a very positive........ to crime prevention.

3, This new discovery traditional beliefs. Some whales are known to ......into warm waters to bear their calves.

5, Seventy-five percent of the earth surface is........by water.

6, Unless the biodiversity were.......marine life would be at stake.

7, Scientists are......how the crash occurred.

8, Spern whale populations are at risk due to hunting are their accidental in.......fishing nets.

9, What can i do to..........my fear of flying?

10. The government has just set up a wildlife......project.

read the passage below anh fill in each blank with one suitable word.

In the (1)........ of the 1970s, the United States organizated several important conferences (2).......... the human evironment to study a very serious problem. We, human are destroying the (3)........... around us. We are using up all our (4)............. resources. We must learnt to consever (5)............. of life will be very bad (6)........... our children and our grandchildren.

Scientists say there is enough water in the world for everyone. (7)........ , some countries have a lot of water and some have only a little. Some areas get all their rain during one season. The rest of the year is (8)......... There are huge forests in the Amazon area in Brazil. In other (9)........ of the world, there is only (10)..........

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