Nowadays, bicycles are very popular around the world. In some places, people use a bicycle 1 to work. Some people even ride their bicycles 2 exercise. But Do you know who 3 the first bicycle? In 1771, a Frenchman named Sivrac invented the first bicycle. The handles and the seat looked 4 a horse and were made of wood. This bicycle was very difficult 5 . In 1817, a German named Sauerbrun made the first bicycle 6 . The seat was more comfortable. The wheels could change direction. 7 in the forest took only one hour instead of three hours on foot. But these bicycles still had no brakes( 刹车 ), and people often 8 . It took another 45 years for the bicycle 9 popular again. Over 100 years later, bicycle riding is 10 popular than before. In fact, there are more bicycles than cars in the world today.