Today we're going to discuss the history of the bicycle. The first pedal-powered bicycle was invented in the 1860s, but it wasn't until the 1880s that the 'safety bicycle' became popular. This design featured two equal-sized wheels and a chain drive, making it much safer than the earlier 'penny-farthing' with its huge front wheel. By the early 1900s, bicycles had become a common means of transport for ordinary people, especially in European cities. Interestingly, the rise of the automobile in the 1920s actually led to a decline in bicycle use for commuting, but cycling remained popular as a leisure activity and sport.
❓ Điều gì đã làm cho 'xe đạp an toàn' an toàn hơn so với các thiết kế trước đó?
A. Nó có bánh trước lớn hơn và bộ truyền động xích.
B. Nó có hai bánh xe bằng nhau và bộ truyền động xích.