《2025年中学生世界八年级英语上册沪教版五四制》

Ⅵ. Fill in the blanks with proper words.
The bicycle is a great invention that has changed the way people travel. In the 19th century, the first bicycles started to appear. At first, they were very different from the ones we use today.
The early bicycles didn't have pedals. People had to p 1 their feet on the ground to move forward. These bicycles were often made of wood and were not very comfortable to ride. But inventors kept working to i 2 them.
In the 1860s, a big change happened. Pedals were added to the front wheel, which made bicycles easier to ride. This new design quickly became p 3 among people.
Later, the "penny-farthing" bicycle came out. It had a very large front wheel and a small back wheel. It could go faster, but it was also dangerous because riders could e 4 fall off.
Finally, in the 1880s, the "safety bicycle" was invented. It had two wheels of the same size and a chain-drive system. This design made bicycles much safer and more c 5. Since then, bicycles have become a popular and e 6 way to get around.
1. ______ 2. ______ 3. ______ 4. ______ 5 ______ 6. ______

答案： 1. push 2. improve 3. popular 4. easily 5. convenient 6. efficient