单项选择题

What is the best title for the passage

A．Different Kinds of Bicycles.
B．Modern Bicycles are Safer than the Old One.
C．History of Bicycles.
D．Invention of Rubber Tyres.
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单项选择题
The earliest bicycles were called running machines because ______.
A．people have to run on feet when using the machines
B．they were faster than running men
C．the riders could run on the bicycles
D．the bicycles could run fast automatically
单项选择题
According to the passage, what does the underlined word pedals mean
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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