[单项选择]

What did the first bicycles look like The earliest bicycles were called "running machines". The rider sat on the seat of the "machine" and pushed it with his feet, The rider ran with his feet but the wheels of the bicycle helped him to go very, fast. These bicycles went faster than a running man but they were very uncomfortable. The wheels were iron and in those days the roads had many holes and big stones.
There was another kind of old bicycle with a big wheel in the front and a small one behind. People called these bicycles "Penny Farthings". In England, many years ago, there were two coins called a penny and a farthing. The farthing was about a quarter of the size of a penny.
The big wheel had pedals. The rider sat on the seat at the top of the big wheel and pushed the pedals with his feet. "Penny Farthings" went much faster than "running machines" because of the big wheel, but were uncomfortable, too. T
A. Something on a bicycle that riders can rest their feet on.
B. A kind of boards on a wheel that can be pressed by foot.
C. Part of the running machines.
D. Levers that drives a bicycle when pressed down by foot.

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