Evolution of the Bicycle

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Complete the sentences below. Choose NO MORE THAN THREE WORDS from the passage for each answer.
Not only one individual or one country, but the whole world took part in the invention of the bicycle over a period of  years. This invention was firstly found in Scotland in the first decades of 1800, and was known as velocipedes. They were not resembled to today's bicycles and had two wheels, but they had no . The rider sat on a pillow and walked his feet along the ground in order to move his velocipede forward. Soon, a French inventor added pedals to the front wheel. However, because of their difficulty in riding, nobody used them in a daily life, and they were accepted as . Around 1870, manufacturers in America found that this invention was popular  but with one difference: frameworks were made from , which makes them much lighter. Soon, the British inventors found the method which can make pedaling more efficient-to turn pedals one by one. They designed a bicycle with a giant front wheel. However, as the rider had to sit high above the giant front wheel it was too difficult to keep the balance. The safer bicycle was invented by Americans. They designed the rear , which minimized the danger of falling and injuring. At last, the British changed the design one last time and added two wheels equal in size and the mechanism that induce a chain to turn the rear wheel. By this there was invented the example of the modern bicycle.

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