Good morning, everyone. 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 against the ground to move forward. Later, in the 1860s, pedals were added to the front wheel, but this made the bicycle difficult to ride because the front wheel was very large. It wasn't until the 1880s that the 'safety bicycle' was introduced, with two wheels of equal size and a chain drive to the rear wheel. This design, which is similar to modern bicycles, became extremely popular and led to a cycling boom in the 1890s.
❓ 강의에 따르면, 앞바퀴에 페달이 달린 자전거의 주요 문제점은 무엇이었나요?
A. A. 그것들은 생산하기에 너무 비쌌다.
B. B. 그들은 앞바퀴가 커서 타기가 어려웠다.
C. C. 그들은 거친 도로에서 사용될 수 없었다.
D. D. 그들은 도시에 들어갈 수 없었다.
✅ 正确答案
B. They were difficult to ride due to the large front wheel.