单项选择题

Which of the following is true

A．Big cities are not safe and clean enough.
B．People can easily find a good place to live in a big cities.
C．Big cities are safe, but not clean.
D．All people like to live in big cities.

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单项选择题

In big cities people can ______.

A．go to different kinds of museums
B．see all kinds of plays and films
C．buy things from all over the world
D．A,B and C

单项选择题

In this passage the writer advised(建议)people

A．to move to a big city
B．not to move to big city
C．not to move to a big city without thinking about the problems there
D．not to think too much about the problems before they move at a big city