Today we're going to discuss the history of the bicycle. The first bicycle, invented in the early 19th century, had no pedals; riders pushed their feet along the ground. Later, pedals were added to the front wheel, which made the ride faster but dangerous, as the front wheel became very large. By the 1880s, the 'safety bicycle' appeared with two equal-sized wheels and a chain drive, making it much safer and more popular. Interestingly, this design also allowed women to ride comfortably, leading to a significant social change in clothing and mobility.
❓ 安全自転車が以前のデザインに比べて持っていた大きな利点は何でしたか？
A. A. 大きな前輪のおかげで、より速くなりました。
B. B. それは均等なサイズの車輪とチェーン駆動により、より安全でした。
C. C. それはより軽く、持ち運びやすかった。
D. D. それは他の自転車よりもメンテナンスが少なくて済んだ。
✅ 正确答案
B. It was safer due to its equal-sized wheels and chain drive.