Driving a car at a high speed   along a highway seems to be fun. You need only to follow the bright traffic signs   beside the highways and they will take you to where you wish. But to a London taxi driver, driving is not an easy job. A taxi driver has to have not only skills but also a good knowledge of the city of London, from the smaller road to the most popular bar  .He has to be at the service of all kinds of people at all times. He usually goes home between 2 and 3 o'clock in the morning. There are times he has to stay longer and try to _  London taxi drivers not only "take" but also "give". Every summer hundreds of children from London will go for a day at the sea by taxi! Their rides are paid by the taxi drivers. At the sea, they are met by the mayor  , and the lunch party is also held for the drivers and children. After a happy day running around the beaches and visiting the markets, the children go home again by taxi, and free  of charge  , of course! It's not easy to be a taxi driver in London because   _  .
there is much traffic in London he has to follow the bright traffic signs he makes little money he has to know all the places in the city and serve all kinds of people at all times