1、Unit 1FogFog warningWhen Polly left home that morning, the city was already covered in a grey mist. At lunch, the radio forecast that the mist would become a thick fog in the afternoon. At four oclock, Polly leftwork and stepped out into the fog .She wondered if the buses would still be running.No b
2、uses to King StreetOnce out in the street, she walked quickly towards her usual bus stop.How far are you going? the bus conductor asked her before he took her fare.King Street. said Polly.Sorry,Miss replied the man, the truth is that it is too foggy for the bus to run that far. Take the Underground
3、to Green Park. The weather might be better there and you might be able to get a taxi.A tall manAs Polly observed the passengers on the train, she had a feeling that she was being watched by a tall man in a dark overcoat. At last the train arrived at Green Park station. While the rest of the passenge
4、rs were getting out, she glanced at the faces around her. The tall man was nowhere to be soon.FootstepsWhen Polly got to the station entrance, it was empty. Outside, wherever she looked the fog lay like a thick, grey cloud. There was no one in sight. Polly set off towards Park Street. As she heard a
5、 mans voice in her ear saying Sorry. The man moved away. She could feel her heart beating with fear.The helpful strangerThen she heard the sound again-soft footsteps behind her. A minute before, she had wished for someone to come along. Now she wanted to run, but fear held her still. The footsteps s
6、eemed close now. Then a mans voice came out of the darkness. Is anybody there?Polly hesitated. At last she answered, Hello, I think Im lost. A few seconds later, a hand reached out and grasped her arm. Polly found herself staring up at the face of an old man with a beard.Maybe I can help you. Which
7、road do you want? he asked.I live at 86 King Street. Polly replied.Just take my hand. said the man. Come with me. Youll be all right. He took Pollys hand. Watch out for the step here.In his other hand the man carried a stick. Polly heard it hit the step. I can remember some terrible fogs, but maybe
8、that was before your time. I cant see your face, but you sound young. How old are you?Just twenty. answered Polly.Ah, twenty ! A nice age to be. I was young once. Now were at the crossroads. Turn left here.Im quite lost now. Are you sure you know the way? Polly was beginning to feel frightened again
9、.Of course. You really shouldnt feel anxious, He held her hand more firmly. The grateful helperHere we are. King Street. He stopped. Thank you so much for coming to my aid. said Polly in relief. Would you like to come in and rest for a while?Its very nice of you. said the man, but Ill be off. There
10、may be more people lost today, and Id like to help them. You see, a fog this bad is rare. It gives me the chance to pay back the help that people give me when its sunny. A blind person like me cant get across the road without help, except in a fog like this. P18ProjectShark attacksThere are nearly 4
11、00 different types of sharks, but only about 30 types are known to have attacked human beings. Many people know that the most dangerous shark is the great white shark, probably because they have seen the film Jaws. However, two other sharks are also rather dangerous: the tiger shark and the bull sha
12、rk. Contrary to what many people might assume, evidence shows that sharks seldom attack humans. There are three types of sharkattacks. In the main type, the shark attacks you because it mistakes you for a fish, but when it tastes human flesh it decides to give up and swims away. In the second type,
13、the shark pushes you with its nose to find out if you are fit to be eaten, and then bites you if it thinks you are. In the third type, the shark waits for you to swim by, and then attacks you suddenly. The last two types of attack more often result in the death of humans.To reduce the risk of a shar
14、k attack, you should follow these suggestions.Do not swim in the dark. Sharks can still see you but you cannot see them.Do not go swimming in the ocean if you have a fresh wound. Sharks can smell blood over a long distance.Do not wear bright clothing or jewellery, because sharks are attracted to the
15、 flash of, colours and bright objects. Stay in groups, as sharks usually avoid large numbers of people.Recently, shark attacks have been increasing as water sports are becoming more popular. If a shark attacks you, follow the advice below.Keep calm. Do not panic.Hit the shark on the nose with your f
16、ist.Stick your finger in the sharks eye.Dont be frightened by sharks: youare 3o times more likely to be hit by lightning than be attacked by a shark. The wonderful world of pigeonsIt is night. All is quiet. The soldiers are asleep while a guard watches for theenemy. There is a flash, and the sound o
17、f guns! They are being attacked!Hundreds of enemy soldiers rush towards them. They are all going to bekilled unless they get help. What should they do?An officer writes a short message quickly on a small piece of paper: Beingattacked! Hurry!He rolls up the paper and puts it into a small case, and th
18、en reaches into acage and gets a bird. Attaching the message to its leg, he sets the bird loose. Itimmediately flies into the air and disappears in the dark.Will the bird arrive in time? Will they be saved?Though it may seem hard to believe, the bird the officer uses is the same birdoften seen in pu
19、blic parks-the pigeon. Pigeons have a wonderful sense ofdirection and can find their way home over long distances. Indeed, pigeonshave been known to fly home from as far away as 1,800 kilometres. That iswhy pigeons have been used since ancient times to carry the news or eventhe mail. However, it was
20、 in war that they found their greatest use. Duringboth World War I and II, pigeons were employed by armies to carry messagesto and from the front lines, saving the lives of many soldiers and evenhelping win some important victories.How do pigeons find their way? Pigeons appear to have a compass insi
21、dethem that tells them which way is north. How this compass works remains amystery. Of course, since a compass alone is not enough to find ones way,they also appear to use their sight and even their sense of smell to tell themwhich way they should go. Unlike humans, they never get lost and canalways
22、 find their way home.Unit 2English and its history All through history, people from many different countries and cultures have lived together in Britain. The English language is made up of the grammar and vocabulary these people brought to Britain. That is why English has so many difficult rules tha
23、t confuse people.Old English Old English is very different from the English we speak nowadays. In fact, we would not be able to understand it if we heard it today. Before the 5th century, people in Britain all spoke a language called Celtic. Then two Germanic groups from the European mainlandthe Ang
24、les and the Saxonsoccupied Britain. Old English consisted of a mixture of their languages. (Both the English language and the English people are named after the Angles; the word Angle was spelt Engle in Old English.) Aside from place names such as London, very few Celtic words became part of Old Eng
25、lish. At the end of the 9th century, the Vikings, people from Northern European countries such as Denmark and Norway, began to move to Britain. They brought with them their languages, which also mixed with Old English. By the 10th century, Old English had become the official language of England. Whe
26、n we speak English today, we sometimes feel puzzled about which words or phrases to use. This is because English has many words and phrases from different languages, but with similar meanings. For example, the word sick came from a word once used by the Angles and the Saxons, while ill came from a w
27、ord once used by the Norwegians.Middle EnglishMiddle English is the name given to the English used from around the 12th to the 15th centuries. Many things played a part in the development of this new type of English. The most important contribution was from the Normans, a French-speaking people who
28、defeated England and took control of the country in 1066. However, the Norman Conquest did not affect English as mush as the Angles and the Saxons victory about 600 years earlier, which led to Old English replacing Celtic. Even though the Normans spoke French for the entire 250 years they ruled Engl
29、and, French did not replace English as the first language. On the other hand, the English language did borrow many words from French. This resulted in even more words with similar meanings, such as answer (from Old English) and reply (from Old French). It is interesting to learn how the words for mo
30、st animals raised for food, such as cow, sheep and pig, came from Old English. However, the words for the meat of these animals, which was served to the Normans, came from Old French: beef, mutton, pork and bacon.Old French made other contributions to Middle English as well. In Old English, the Germ
31、anic way of making words plural was used. For example, they said housen instead of houses, and shoen instead of shoes. After the Normans took control, they began using the French way of making plurals, adding an -s to house and shoe. Only a few words kept their Germanic plural forms, such as man/men
32、 and child/children. After the Norman Conquest, high-class people spoke French while common people spoke English. However, by the latter half of the 14th century, English had come into widespread use among all classes in England. In 1399, Henry became King of England. His mother tongue was English,
33、and he used English for all official events. Modern English Modern English appeared during the Renaissance in the 16th century. Because of this Modern English includes many Latin and Greek words. Pronunciation also went through huge changes during this period. Of course, this was not the end of the
34、changes in the English language. The question of whether English will keep on changing in the future is easy to answer. It is certain that this process will continue, and people will keep inventing new words and new ways of saying things.ProjectThe development Chinese charactersThe Chinese language
35、differs from Western languages in that, instead of an alphabet, ituses characters which stand for ideas, objects or deeds. Chinese words are formed byputting together different characters. In many cases, a single character can also make up aword. The history of the Chinese language can be examined b
36、y looking athow these characters developed.Chinese writing began thousands of years ago. According to an ancientstory, a man named Cang Jie invented Chinese writing. One winter daywhile he was hunting, he saw the tracks of animals in the snow andobserved that the appearance of each one was different
37、. Then he had theidea that he could use different shapes to represent different objects. Thefirst Chinese characters were drawings of physical objects. Some charactershave been simplified and others have been made more difficult over time.However, as a whole, the characters have developed from drawi
38、ngs intostandard forms. The character for a mountain was at first three mountaintops together.This became one mountaintop and three lines, and over time turned into the characterused nowadays.Not all characters were developed from drawings of objects. Sometimes to express ideas,some characters were
39、made by combining two or more characters together. For example,rest was made up of the characters for a man and a tree. The character prisoner wasformed with a man inside a square. Other characters were developed for directions andnumbers. It is easy to distinguish their meanings by looking at them,
40、 for example, thecharacters for up and down, which are opposites of each other.Though these kinds of characters indicate meanings, one of their shortcomings is thatthey do not show how they should be pronounced. Therefore, a method was developedto have one part of a character indicate the meaning an
41、d the other suggest thepronunciation. Many Chinese characters used today were made this way.In the 1950s the Chinese government introduced simplified Chinese characters and nowthey have widespread use in Chinas mainland.The story of BrailleUsually, when we talk about reading, we think of using our e
42、yes to see letters written in ink on paper. However, this is not always true. For example, blind people cannot see, but they can still read books.The man who introduced blind people to reading was Louis Braille (1809-1852). Braille lost his eyesight at the age of three as a result of an injury. When
43、 he was ten, he went to a school for the blind in Paris. In those days, books for blind people used paper pressed against metal wire to form letters. Since the metal wire was heavy, each book weighed as much as 100 pounds. The whole system was not convenient for use. Indeed, the school library only
44、had fourteen such books in it.In 1821, a soldier visited the school and showed the students a system for passing messages at night during times of battle. His system used paper with small, raised dots that could be felt with the fingers. Each letter of the alphabet was represented by a different pat
45、tern which consisted of twelve dots. The soldiers would drag their fingers over the raised dots to read the message. While the students found the soldiers idea interesting, the system was too difficult to be of practical use. However, young Louis Braille took the idea and worked on it. At the age of
46、 fifteen, he created a system with patterns of six raised dots representing each letter. Braille, the system for reading used today by blind people around the world, was thus born.The blind can easily recognize Braille with the fingers. They can also easily write in Braille with a special typewriter
47、. Today, it is the most common system used by blind people for reading and writing, and nearly every language, including Chinese, has its own version of Braille for its people to use.Unit 3Lost civilizationsDay 1,15 JulyI feel lucky to have won a place on this trip. We are in Italy now, and tomorrow
48、 we are visiting Pompeii. Next week we are flying to China, and going to Loulan, which is known as Chinas Pompeii in the desert. Both Pompeii and Loulan became lost civilizations long ago.Day 2,16 JulyThis morning we attended a lecture about Pompeii. The city was founded in the 8th century BC. In 89 BC, the Romans took over Pompeii. It then became a rich and busy city. Near the city was a volcano. On 24th August AD 79, the volcano erupted and lava, ash and rocks poured out of it onto the surrounding countryside. It