Today we're going to discuss the history of the bicycle. The first bicycle, invented in the early 19th century, had no pedals and was pushed along by the rider's feet. It was called a 'hobby horse'. Later, in the 1860s, pedals were added to the front wheel, but this design was unstable and difficult to ride. It wasn't until the 1880s that the 'safety bicycle' with a chain drive and two equal-sized wheels became popular, making cycling much safer and more accessible to the general public.
❓ 何が安全自転車を初期のデザインよりも人気にしたのでしょうか？
A. A. それはより大きな前輪を備えていた。
B. B. それはより軽く、そして生産コストがより安かった。
C. C. 安全性のため、チェーンドライブと同サイズの車輪を採用していた。
D. D. 前輪にペダルが取り付けられていた。
✅ 正确答案
C. It used a chain drive and equal-sized wheels for safety.