Today we're going to discuss the history of the bicycle. The first two-wheeled vehicle, called the draisine, was invented in 1817 by a German baron. It had no pedals; riders pushed their feet against the ground. In the 1860s, pedals were added to the front wheel in France, creating the 'boneshaker'. Later, the high-wheel bicycle became popular in the 1870s, but it was dangerous because of its large front wheel. The modern 'safety bicycle' with equal-sized wheels and a chain drive was introduced in 1885, making cycling much safer and more accessible.
❓ 高輪自転車が危険だと考えられた主な理由は何でしたか？
A. A. それはブレーキがなかった。
B. B. その大きな前輪が不安定さを引き起こし、転倒の原因となった。
C. C. 重すぎて制御できなかった。
D. D. ペダルは後輪に取り付けられていた。
✅ 正确答案
B. Its large front wheel caused instability and falls.