The bicycle is one of the world's oldest forms of transport. In fact, the first successful bicycle was ____ over two hundred years ago He made it almost ____ out of wood, even the wheels! This meant that it wasn't ____ comfortable to ride Various designs were used during the nineteenth century, ____ machines with three and four wheels. Perhaps the most important ____ of this time, however, was introduced by Scottish engineer, John Dunlop. ...so they quickly became more popular as a ____ of transport

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