Travel is useful to us in at least three ways:

    First, by travelling we can enjoy the beautiful scenery of different 1. We can see many places 2our own eyes which can be read about in books, and visit some famous cities.

    Second, we will 3 people with different interests and see strange and different things. We can get to know the4of places, and taste different foods and local flavour if we like. 5this way, we can understand6 differently other people live. Third, travel will not only help us to7 the knowledge of geography, history and other knowledge 8will also help us keep healthy and make us9narrow-minded.

    With all these advantages of travel, it is no wonder10 travel has now become more popular than ever in China.

    Today most countries have at least one airline that flies to foreign countries and one airline that flies inside the country. Some countries have several of each.

    The world's first passenger airline was called the St. Petersburg Tampa Airboat Line. This St. Petersburg was in Florida in the USA, and the airline took passengers on a 20-mile flight across Tampa Bay. It operated for only four months from January 1914.

    The first European airline flew every day from Berlin to Weimar called Deutsche Lutt-Reederei (DLR). It started to operate on 6 February 1919. At first it carried only mail and newspapers, but before long it took passengers as well. The planes were open to the air so passengers had to wear special clothing and shoes to protect them from the wind, rain and cold.

    In March 1919 the first international airline began to operate.  Lignes Aeriennes Farman flew once a week between Paris and Brussels. The journey took two hours and 50 minutes. Later that year, an English airline, Air Transport and Travel, flew every day from London to Paris.

    Although the first passenger flights took place in the USA, the development of air travel in America was strangely slow; it was not until 1926 that there were any regular passenger services there. It was not until 1939 that the first service across the North Atlantic began to operate. This was a service by the Pan American Boeing 314 flying boat, Yankee Clipper, which took 18 hours and 42 minutes to cover the journey between Newfoundland in North America and Southampton in England. The journey now takes about four hours by Boeing 777 and half that by Concorde.

    Today for many people air travel is as much part of their lives as traveling by boat, car or train. Although it has not seriously affected travel by car or train, it has caused many shipping lines to stop carrying passengers, as most people now prefer to make long journeys by air rather than by sea.

       It can be dangerous to travel by sea. Ships sometimes1 far away from land. When this happens, the sailors(海员) have to get into small boats. If another ship does not come and help them and they do not have enough food or water, they will  2.

       Most people believe we must not drink sea water. They believe that if we3,we shall be very ill 4 all the salt in the water. A doctor called Alain Bombard did not believe this. He thought that people could stay alive by5sea water and eating small fish, animals and plants from the sea. On 19 October 1953, he set out in a small boat to6 the Atlantic Ocean(大西洋). He did not take any food or water with him.

      Every day Dr. Bombard drank just a little sea water. He also caught fish and they had water7 them. He drank this water. He could not cook the fish, so he ate them as they were. He took small plants from the sea, 8 gave him more food. Dr. Bombard became 9, tired and quite ill, but after 65 days at sea he was still alive. He traveled 2,750 miles from one side of the Atlantic Ocean to the other, and on 24th,December 1953, he reached Barbados.

     He lost 20 kilos,but he showed that people could live 10 sea water, the animals and plants in the sea.