Complete the text by filling in the correct forms of the verbs from the brackets.

Here's the completed text: Red London double-deckers became a symbol of London. During an average working day together with Underground London buses carry 5.5 million people. The first London bus started running in 1829 between Paddington and the City. It was a horse-drawn coach called an "omnibus". At the beginning of the 1900s, the first motorized buses were introduced, the result of many years of technical development. London buses were used in both World Wars. During WWI they carried troops to the front. The upper deck was roofless then. You can see such buses carrying tourists around London nowadays. London double-deckers are one of the major means of transport. It’s a surprise how a huge bus can find its way through narrow central streets of overcrowded London. Each double-decker has a conductor who takes the fare and gives the signal to the driver to start. There are a lot of bus routes all around the city. Nowadays you can also observe double-deckers of different colours: green, black and yellow. They are decorated with advertising slogans. You can see a replica of the original omnibus and operate the controls of a modern bus in the London Transport Museum in Covent Garden.