Edmund Halley was an English scientist who lived over 200 years ago. He studied the observations of comets(彗星) which other scientists had made. The orbit of one particular comet was a very difficult mathematical problem. He could not figure it out. Neither could other scientists who dealt with such problems.

    However, Halley had a friend named Isaac Newton, who was a brilliant mathematician. Newton thought he had already worked out that problem, but he could not find the papers on which he had done it. He told Halley that the orbit of a comet had the shape of an ellipse.

    Now Halley set to work. He figured out the orbits of some of the comets that had been observed by scientists. He made a surprising discovery. The comets that had appeared in the years 1531, 1607 and 1682 all had the same orbit. Yet their appearances had been 75 to 76 years apart.

    This seemed very strange to Halley. Three different comets followed the same orbit. The more Halley thought about, the more he thought that there had not been three different comets, as people thought. He decided that they had simply seen the same comet three times. The comet had gone away and had come back again.

    It was an astonishing idea! Halley felt certain enough to make a prediction of what would happen in the future. He decided that this comet would appear in the year 1758. There were 53 years to go before Halley's prediction could be tested.

    In 1758 the comet appeared in the sky. Halley did not see it, for he had died some years before. Ever since then that comet had been called Halley's comet, in his honour.

    If you wish to become a better reader, here are four important points to remember about rate, or speed, of reading:

    ⒈Knowing why you are reading—what you are reading to find out—will often help you to know whether to read rapidly or slowly.

    ⒉Some things should be read slowly throughout. Examples are directions for making or doing something, arithmetic problems, science and history books, which are full of important information. You must read such things slowly to remember each important step and understand each important idea.

    ⒊Some things should be read rapidly throughout. Examples are simple stories meant for enjoyment, news, and letters from friends, items, or bits of news from local, or hometown, paper, telling what is happening to friends and neighbors.

    ⒋In some of your readings, you must change your speed from fast to slow to fast, as you go along. You need to read certain pages rapidly and then slow down and do more careful readings when you come to important ideas which must be remembered.

    Teachers'Day is, interestingly, not celebrated on the same day all over the world. In some countries it is marked by a holiday, in others it is a working day.

    International Teachers' Day is celebrated on October 5. Being held ever since 1994, it is in honor of teachers' organizations worldwide. Its aim is to encourage supports for teachers and to meet the needs of students.

    China   In 1939, Teachers' Day was set for August 27, Confucius' birthday. In1951, the celebration was stopped. However, it was founded again in 1985, and the day was changed to September 10.

    India   Teachers' Day is celebrated on September 5 in honour of Dr. Sarvepalli Radhakrishnan, the second president of India, whose birthday falls on that day.

    Russia   In Russia, Teachers' Day was celebrated on the first Sunday of October between 1965 and 1994. Since 1994, the day is observed on the October 5, just the same day as World Teachers' Day.

    The US   In the US, Teachers' Day is non-official holiday. It is celebrated on the Tuesday of the first full week of May. A number of activities are organized in schools to honor teachers. The celebrations can continue for the whole week of May.

    Thailand   In Thailand, National Teachers' Day is celebrated every year on January 16. The first Teachers' Day was held in 1957. The day is a holiday in schools.

    Garden of the Drunken Bai Pond

    With a history of more than 300 years, the Pond of the Drunken Bai, a classical garden in the style of Ming Dynasty, is among the Five Classical Gardens in Shanghai. "Bai" is said to be Li Bai, a famous poet in the Tang Dynasty. However, some believe that "Bai" indicates Bai Juyi, another well-known poet in the Tang Dynasty.

    Zhujiajiao Ancient Town

    Located at the bank of the Dianshan Lake in Qingpu District, Zhujiajiao Ancient Town, with a history of over 1,000 years, has been known as "Venice of Shanghai" for its simple but attractive appearance. Inside the own are rivers and bridges, giving tourists a sense of the ancient time.

    Upside-down House

    In China, the upside-down house is a new thing, but in foreign countries, it is getting more and more popular in recent years, especially in Poland. As is name suggests, the house is built inverted（倒置的）. Inside it, all the furniture and household items are placed upside down. People will feel the magic of a disorder space when walking in the house.

    Chenshan Botanical Garden

    The garden covers a total area of about 206 hectares（公顷）. Its theme is "plant and Health", combining research, education and landscape appreciation. It opened to the public in April, 2010, and is expected to be the largest one in Shanghai.

Tickets: 40 yuan per person; children under l.2m: free of charge if accompanied by an adult.

    Mother Teresa (August 26, 1910-September 5, 1997) was a great woman, who did a lot to improve the social condition of mankind. Due to her contribution in serving the society, she was awarded the Nobel Peace Prize aged 69.

    She was brought up in a Catholic family. When she was only seven, she lost her father. Even as a young child, she was interested in the life of missionaries (传教士). At the age of 18, she decided that she would become a nun. She left her home and went to join the Sisters of Loreto. It was the first step that she made towards providing services for mankind.

    On the 7th of October in the year 1950, Mother Teresa received Vatican permission to start the Missionaries of Charity in Calcutta, the mission of which would be to take care of the needy, the homeless, and people who were shunned by the society. Then it had a number of branches all over the country. The journey of Mother Teresa's Missionaries of Charity started with the setting up of homes for "the Dying".

    In the year 1983, Mother Teresa suffered from a serious heart attack, while she was in Rome. However, she recovered. But, later in 1989, she again got an attack. Her health went worse and in the year 1991, she suffered from pneumonia. Taking her health problems into consideration, Mother Teresa decided to resign (辞职) from the post of head of the order.

    A secret vote was conducted in which all the nuns voted for the stay of Mother Teresa except herself. So, she agreed to continue serving as head of the Missionaries of Charity. Day by day her health was getting worse. On September 5, 1997, exactly nine days after her 87th birthday, this great soul departed for heaven.

Channel Islands

The two main islands, Jersey and Guernsey, are remarkable in that they present a combination of enjoyment peace and quiet. Neither island is very big (only ten miles long) and so all parts of these coasts are easily reached from the main centers — St. Helier and St. Peter Port. In both these towns and particularly in Jersey's St. Helier are concentrated (集中) the amusements of really big resorts (休养地). The nearness of France gives a continental atmosphere; the weather is far better than that in England. The other three islands, Jethou, Herm and Sark are small and quiet.

Isles of Scilly

The islands are really small and quiet; and the weather is warm but windy. The islands are excellent for those who enjoy exploring (探险) small inlets (水湾), creeks (小溪) and bays on foot, or even better in a boat.

Isle of Wight

The island is 24 miles across and therefore quite large. The scenery is good and varied. The resorts are neither overlarge nor showy. The crowds seem content with entertaining but quieter holidays. The island has the best sunshine record in Britain.

Isle of Man

An island with unique atmosphere — in some indefinable (难以描述的) way it is different from England, Scotland or Wales. Thirty miles long, with good roads and good public transport, the mountains, hills and glens (幽谷) are easily reached. Douglas is a major British resort and other resorts are lively.