单项选择题

With which of the following subjects is the passage mainly concerned

A．Types of mass transportation.
B．Instability of urban life.
C．How supply and demand determine land use.
D．The effect of mass transportation on urban expansion.

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单项选择题

The author mentions Chicago in the second paragraph as an example of a city, ______.

A．which is large
B．which is used as a model for land development
C．where the development of land exceeded population growth
D．with an excellent mass transportation system

单项选择题

According to the passage, what was one disadvantage of residential expansion

A．It was expensive.
B．It happened too slowly.
C．It was unplanned.
D．It created a demand for public transportation.