Good morning, everyone. Today we're going to discuss the history of the bicycle. Now, many people think the bicycle was invented in the 19th century, but its earliest form appeared in 1817, when a German inventor created a wooden, two-wheeled device called a 'running machine.' It had no pedals; riders pushed their feet against the ground to move forward. Later, in the 1860s, pedals were added to the front wheel, but the ride was very bumpy. It wasn't until 1885 that the 'safety bicycle' with a chain drive and two equal-sized wheels was introduced, which made cycling much more comfortable and popular.
❓ 1885年に導入された安全自転車の主な改良点は何でしたか？
A. A. それは木製の車輪を備えていた。
B. B. 前輪にペダルが付いていた。
C. C. それはチェーン駆動であり、同じ大きさの二つの車輪を備えていた。
D. D. それはより軽く、折りたたむことができた。
✅ 正确答案
C. It had a chain drive and two equal-sized wheels.