单项选择题

The structure of the family, which is a basic unit of the society, changes along with the development of the society.（）

A．家庭结构是社会结构的基本单位，它随着社会的发展而变化。
B．家庭结构是社会结构的基本单位，同社会一起向前发展。
C．家庭是社会的基本单位，其结构随着社会的发展而变化。
D．家庭是社会的基本单元，同社会一起向前发展。

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热门试题

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.