单项选择题

The purpose of the passage is to ______.

A．describe the harmful air pollution
B．explain the way to prevent air pollution
C．recommend a method to avoid air pollution
D．show the worries about the air pollution

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单项选择题

Which of the following statements is NOT TRUE according to the passage

A．Kids are in greater danger than grownups in Mexico City.
B．The author is not a native Mexican.
C．The Mexican history and culture appeal to the author.
D．The author's husband is a pediatrician.

单项选择题

According to the passage, the current emergency in Mexico City refers to ______.

A．economic crisis
B．serious air pollution
C．unemployment
D．natural disaster